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Overview
Comment:Pickup the SQLite core library 3.15.2 docs from upstream.
Downloads: Tarball | ZIP archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: a434cb346051cd706643e3a4691284708c1977dc
User & Date: mistachkin 2016-11-28 22:51:32.776
Context
2016-11-28
23:05
Add SQLite core library docs for the 'column-name-list' syntax element. check-in: e6c1544623 user: mistachkin tags: trunk
22:51
Pickup the SQLite core library 3.15.2 docs from upstream. check-in: a434cb3460 user: mistachkin tags: trunk
22:13
Update SQLite core library to the 3.15.2 release. check-in: e28b32319a user: mistachkin tags: trunk
Changes
Unified Diff Ignore Whitespace Patch
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<p>The following syntax documentation topics are available:</p>

<table width="100%" cellpadding="5" border="0">
<tr><td valign="top"><ul>

<style>
#listtab26 tr td {vertical-align:top;}
</style>
<table id='listtab26' width='100%'></table>
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{"u":"lang_transaction.html","x":"COMMIT TRANSACTION","s":0},
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<p>The following syntax documentation topics are available:</p>

<table width="100%" cellpadding="5" border="0">
<tr><td valign="top"><ul>

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</ul></td></tr></table>

<p>The routines <a href="c3ref/prepare.html">sqlite3_prepare_v2()</a>, <a href="c3ref/prepare.html">sqlite3_prepare()</a>,
<a href="c3ref/prepare.html">sqlite3_prepare16()</a>, <a href="c3ref/prepare.html">sqlite3_prepare16_v2()</a>, 
<a href="c3ref/exec.html">sqlite3_exec()</a>, and <a href="c3ref/free_table.html">sqlite3_get_table()</a> accept







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</ul></td></tr></table>

<p>The routines <a href="c3ref/prepare.html">sqlite3_prepare_v2()</a>, <a href="c3ref/prepare.html">sqlite3_prepare()</a>,
<a href="c3ref/prepare.html">sqlite3_prepare16()</a>, <a href="c3ref/prepare.html">sqlite3_prepare16_v2()</a>, 
<a href="c3ref/exec.html">sqlite3_exec()</a>, and <a href="c3ref/free_table.html">sqlite3_get_table()</a> accept
Changes to Doc/Extra/Core/lang_aggfunc.html.
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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
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<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
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<ul>

<li><a href='docs.html'>Documentation</a>

<li><a href='support.html'>Support</a>
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elements are filtered before being passed into the aggregate function.
For example, the function "count(distinct X)" will return the number
of distinct values of column X instead of the total number of non-null
values in column X.
</p>

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<hr class='xhr'>
<dl>
<a name="avg"></a>
<dt><p><b>avg(<i>X</i>)</b></dt><dd><p>
  The avg() function
  returns the average value of all non-NULL <i>X</i> within a







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elements are filtered before being passed into the aggregate function.
For example, the function "count(distinct X)" will return the number
of distinct values of column X instead of the total number of non-null
values in column X.
</p>

<style>
#listtab27 tr td {vertical-align:top;}
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<table id='listtab27' width='100%'></table>
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<hr class='xhr'>
<dl>
<a name="avg"></a>
<dt><p><b>avg(<i>X</i>)</b></dt><dd><p>
  The avg() function
  returns the average value of all non-NULL <i>X</i> within a
Changes to Doc/Extra/Core/lang_altertable.html.
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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>ALTER TABLE</h2></div><p><b><a href="syntax/alter-table-stmt.html">alter-table-stmt:</a></b>
<button id='x739' onclick='hideorshow("x739","x740")'>hide</button></p>
 <div id='x740' class='imgcontainer'>
 <img alt="syntax diagram alter-table-stmt" src="images/syntax/alter-table-stmt.gif" />
<p><b><a href="syntax/column-def.html">column-def:</a></b>
<button id='x741' onclick='hideorshow("x741","x742")'>show</button></p>
 <div id='x742' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram column-def" src="images/syntax/column-def.gif" />
<p><b><a href="syntax/column-constraint.html">column-constraint:</a></b>
<button id='x743' onclick='hideorshow("x743","x744")'>show</button></p>
 <div id='x744' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram column-constraint" src="images/syntax/column-constraint.gif" />
<p><b><a href="syntax/conflict-clause.html">conflict-clause:</a></b>
<button id='x745' onclick='hideorshow("x745","x746")'>show</button></p>
 <div id='x746' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram conflict-clause" src="images/syntax/conflict-clause.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x747' onclick='hideorshow("x747","x748")'>show</button></p>
 <div id='x748' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x749' onclick='hideorshow("x749","x750")'>show</button></p>
 <div id='x750' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x751' onclick='hideorshow("x751","x752")'>show</button></p>
 <div id='x752' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x753' onclick='hideorshow("x753","x754")'>show</button></p>
 <div id='x754' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x755' onclick='hideorshow("x755","x756")'>show</button></p>
 <div id='x756' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x757' onclick='hideorshow("x757","x758")'>show</button></p>
 <div id='x758' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x759' onclick='hideorshow("x759","x760")'>show</button></p>
 <div id='x760' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x761' onclick='hideorshow("x761","x762")'>show</button></p>
 <div id='x762' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x763' onclick='hideorshow("x763","x764")'>show</button></p>
 <div id='x764' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x765' onclick='hideorshow("x765","x766")'>show</button></p>
 <div id='x766' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x767' onclick='hideorshow("x767","x768")'>show</button></p>
 <div id='x768' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/foreign-key-clause.html">foreign-key-clause:</a></b>
<button id='x769' onclick='hideorshow("x769","x770")'>show</button></p>
 <div id='x770' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram foreign-key-clause" src="images/syntax/foreign-key-clause.gif" />
</div>
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x771' onclick='hideorshow("x771","x772")'>show</button></p>
 <div id='x772' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x773' onclick='hideorshow("x773","x774")'>show</button></p>
 <div id='x774' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x775' onclick='hideorshow("x775","x776")'>show</button></p>
 <div id='x776' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x777' onclick='hideorshow("x777","x778")'>show</button></p>
 <div id='x778' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
</div>









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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>ALTER TABLE</h2></div><p><b><a href="syntax/alter-table-stmt.html">alter-table-stmt:</a></b>
<button id='x743' onclick='hideorshow("x743","x744")'>hide</button></p>
 <div id='x744' class='imgcontainer'>
 <img alt="syntax diagram alter-table-stmt" src="images/syntax/alter-table-stmt.gif" />
<p><b><a href="syntax/column-def.html">column-def:</a></b>
<button id='x745' onclick='hideorshow("x745","x746")'>show</button></p>
 <div id='x746' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram column-def" src="images/syntax/column-def.gif" />
<p><b><a href="syntax/column-constraint.html">column-constraint:</a></b>
<button id='x747' onclick='hideorshow("x747","x748")'>show</button></p>
 <div id='x748' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram column-constraint" src="images/syntax/column-constraint.gif" />
<p><b><a href="syntax/conflict-clause.html">conflict-clause:</a></b>
<button id='x749' onclick='hideorshow("x749","x750")'>show</button></p>
 <div id='x750' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram conflict-clause" src="images/syntax/conflict-clause.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x751' onclick='hideorshow("x751","x752")'>show</button></p>
 <div id='x752' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x753' onclick='hideorshow("x753","x754")'>show</button></p>
 <div id='x754' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x755' onclick='hideorshow("x755","x756")'>show</button></p>
 <div id='x756' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x757' onclick='hideorshow("x757","x758")'>show</button></p>
 <div id='x758' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x759' onclick='hideorshow("x759","x760")'>show</button></p>
 <div id='x760' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x761' onclick='hideorshow("x761","x762")'>show</button></p>
 <div id='x762' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x763' onclick='hideorshow("x763","x764")'>show</button></p>
 <div id='x764' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x765' onclick='hideorshow("x765","x766")'>show</button></p>
 <div id='x766' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x767' onclick='hideorshow("x767","x768")'>show</button></p>
 <div id='x768' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x769' onclick='hideorshow("x769","x770")'>show</button></p>
 <div id='x770' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x771' onclick='hideorshow("x771","x772")'>show</button></p>
 <div id='x772' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/foreign-key-clause.html">foreign-key-clause:</a></b>
<button id='x773' onclick='hideorshow("x773","x774")'>show</button></p>
 <div id='x774' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram foreign-key-clause" src="images/syntax/foreign-key-clause.gif" />
</div>
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x775' onclick='hideorshow("x775","x776")'>show</button></p>
 <div id='x776' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x777' onclick='hideorshow("x777","x778")'>show</button></p>
 <div id='x778' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x779' onclick='hideorshow("x779","x780")'>show</button></p>
 <div id='x780' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x781' onclick='hideorshow("x781","x782")'>show</button></p>
 <div id='x782' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
</div>


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<p> The execution time of the ALTER TABLE command is independent of
the amount of data in the table.  The ALTER TABLE command runs as quickly
on a table with 10 million rows as it does on a table with 1 row.
</p>

<p>After ADD COLUMN has been run on a database, that database will not
be readable by SQLite version 3.1.3 and earlier.</p>

<a name="otheralter"></a>

<h3>Making Other Kinds Of Table Schema Changes</h3>

<p> The only schema altering commands directly supported by SQLite are the
"rename table" and "add column" commands shown above.  However, applications







|







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<p> The execution time of the ALTER TABLE command is independent of
the amount of data in the table.  The ALTER TABLE command runs as quickly
on a table with 10 million rows as it does on a table with 1 row.
</p>

<p>After ADD COLUMN has been run on a database, that database will not
be readable by SQLite version 3.1.3 (2005-02-20) and earlier.</p>

<a name="otheralter"></a>

<h3>Making Other Kinds Of Table Schema Changes</h3>

<p> The only schema altering commands directly supported by SQLite are the
"rename table" and "add column" commands shown above.  However, applications
Changes to Doc/Extra/Core/lang_analyze.html.
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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>

<li><a href='docs.html'>Documentation</a>

<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">







>

>







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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>
<li><a href='about.html'>About</a>
<li><a href='docs.html'>Documentation</a>
<li><a href='download.html'>Download</a>
<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">
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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>ANALYZE</h2></div><p><b><a href="syntax/analyze-stmt.html">analyze-stmt:</a></b>
<button id='x779' onclick='hideorshow("x779","x780")'>hide</button></p>
 <div id='x780' class='imgcontainer'>
 <img alt="syntax diagram analyze-stmt" src="images/syntax/analyze-stmt.gif" />
</div>


<p> The ANALYZE command gathers statistics about tables and
indices and stores the collected information
in <a href="fileformat2.html#intschema">internal tables</a> of the database where the query optimizer can







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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>ANALYZE</h2></div><p><b><a href="syntax/analyze-stmt.html">analyze-stmt:</a></b>
<button id='x783' onclick='hideorshow("x783","x784")'>hide</button></p>
 <div id='x784' class='imgcontainer'>
 <img alt="syntax diagram analyze-stmt" src="images/syntax/analyze-stmt.gif" />
</div>


<p> The ANALYZE command gathers statistics about tables and
indices and stores the collected information
in <a href="fileformat2.html#intschema">internal tables</a> of the database where the query optimizer can
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final digit larger than "4".
All of these tables are collectively referred to as "statistics tables".
</p>

<p> The content of the statistics tables can be queried using <a href="lang_select.html">SELECT</a>
and can be changed using the <a href="lang_delete.html">DELETE</a>, <a href="lang_insert.html">INSERT</a>, and <a href="lang_update.html">UPDATE</a> commands.
The <a href="lang_droptable.html">DROP TABLE</a> command works on statistics tables
as of SQLite version 3.7.9.
The <a href="lang_altertable.html">ALTER TABLE</a> command does not work on statistics tables.
Appropriate care should be used when changing the content of the statistics
tables as invalid content can cause SQLite to select inefficient
query plans.  Generally speaking, one should not modify the content of
the statistics tables by any mechanism other than invoking the
ANALYZE command.  
See "<a href="optoverview.html#manctrl">Manual Control Of Query Plans Using SQLITE_STAT Tables</a>" for







|







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final digit larger than "4".
All of these tables are collectively referred to as "statistics tables".
</p>

<p> The content of the statistics tables can be queried using <a href="lang_select.html">SELECT</a>
and can be changed using the <a href="lang_delete.html">DELETE</a>, <a href="lang_insert.html">INSERT</a>, and <a href="lang_update.html">UPDATE</a> commands.
The <a href="lang_droptable.html">DROP TABLE</a> command works on statistics tables
as of SQLite version 3.7.9. (2011-11-01)
The <a href="lang_altertable.html">ALTER TABLE</a> command does not work on statistics tables.
Appropriate care should be used when changing the content of the statistics
tables as invalid content can cause SQLite to select inefficient
query plans.  Generally speaking, one should not modify the content of
the statistics tables by any mechanism other than invoking the
ANALYZE command.  
See "<a href="optoverview.html#manctrl">Manual Control Of Query Plans Using SQLITE_STAT Tables</a>" for
Changes to Doc/Extra/Core/lang_attach.html.
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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>

<li><a href='docs.html'>Documentation</a>

<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">







>

>







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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>
<li><a href='about.html'>About</a>
<li><a href='docs.html'>Documentation</a>
<li><a href='download.html'>Download</a>
<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">
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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>ATTACH DATABASE</h2></div><p><b><a href="syntax/attach-stmt.html">attach-stmt:</a></b>
<button id='x781' onclick='hideorshow("x781","x782")'>hide</button></p>
 <div id='x782' class='imgcontainer'>
 <img alt="syntax diagram attach-stmt" src="images/syntax/attach-stmt.gif" />
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x783' onclick='hideorshow("x783","x784")'>show</button></p>
 <div id='x784' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x785' onclick='hideorshow("x785","x786")'>show</button></p>
 <div id='x786' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x787' onclick='hideorshow("x787","x788")'>show</button></p>
 <div id='x788' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x789' onclick='hideorshow("x789","x790")'>show</button></p>
 <div id='x790' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x791' onclick='hideorshow("x791","x792")'>show</button></p>
 <div id='x792' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x793' onclick='hideorshow("x793","x794")'>show</button></p>
 <div id='x794' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x795' onclick='hideorshow("x795","x796")'>show</button></p>
 <div id='x796' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x797' onclick='hideorshow("x797","x798")'>show</button></p>
 <div id='x798' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x799' onclick='hideorshow("x799","x800")'>show</button></p>
 <div id='x800' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x801' onclick='hideorshow("x801","x802")'>show</button></p>
 <div id='x802' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x803' onclick='hideorshow("x803","x804")'>show</button></p>
 <div id='x804' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x805' onclick='hideorshow("x805","x806")'>show</button></p>
 <div id='x806' style='display:none;' class='imgcontainer'>
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<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x789' onclick='hideorshow("x789","x790")'>show</button></p>
 <div id='x790' style='display:none;' class='imgcontainer'>
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</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x791' onclick='hideorshow("x791","x792")'>show</button></p>
 <div id='x792' style='display:none;' class='imgcontainer'>
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</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x793' onclick='hideorshow("x793","x794")'>show</button></p>
 <div id='x794' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x795' onclick='hideorshow("x795","x796")'>show</button></p>
 <div id='x796' style='display:none;' class='imgcontainer'>
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</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x797' onclick='hideorshow("x797","x798")'>show</button></p>
 <div id='x798' style='display:none;' class='imgcontainer'>
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</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x799' onclick='hideorshow("x799","x800")'>show</button></p>
 <div id='x800' style='display:none;' class='imgcontainer'>
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<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x801' onclick='hideorshow("x801","x802")'>show</button></p>
 <div id='x802' style='display:none;' class='imgcontainer'>
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</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x803' onclick='hideorshow("x803","x804")'>show</button></p>
 <div id='x804' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x805' onclick='hideorshow("x805","x806")'>show</button></p>
 <div id='x806' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x807' onclick='hideorshow("x807","x808")'>show</button></p>
 <div id='x808' style='display:none;' class='imgcontainer'>
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</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x809' onclick='hideorshow("x809","x810")'>show</button></p>
 <div id='x810' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x811' onclick='hideorshow("x811","x812")'>show</button></p>
 <div id='x812' style='display:none;' class='imgcontainer'>
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<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x813' onclick='hideorshow("x813","x814")'>show</button></p>
 <div id='x814' style='display:none;' class='imgcontainer'>
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<button id='x823' onclick='hideorshow("x823","x824")'>hide</button></p>
 <div id='x824' class='imgcontainer'>
 <img alt="syntax diagram comment-syntax" src="images/syntax/comment-syntax.gif" />
</div>


<p>Comments are not SQL commands, but can occur within the text of
SQL queries passed to <a href="c3ref/prepare.html">sqlite3_prepare_v2()</a> and related interfaces.
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<button id='x827' onclick='hideorshow("x827","x828")'>hide</button></p>
 <div id='x828' class='imgcontainer'>
 <img alt="syntax diagram comment-syntax" src="images/syntax/comment-syntax.gif" />
</div>


<p>Comments are not SQL commands, but can occur within the text of
SQL queries passed to <a href="c3ref/prepare.html">sqlite3_prepare_v2()</a> and related interfaces.
Comments are treated as whitespace by the parser.
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<button id='x1135' onclick='hideorshow("x1135","x1136")'>hide</button></p>
 <div id='x1136' class='imgcontainer'>
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<p>The ON CONFLICT clause is not a separate SQL command.  It is a
non-standard clause that can appear in many other SQL commands.
It is given its own section in this document because it is not







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<button id='x1141' onclick='hideorshow("x1141","x1142")'>hide</button></p>
 <div id='x1142' class='imgcontainer'>
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</div>


<p>The ON CONFLICT clause is not a separate SQL command.  It is a
non-standard clause that can appear in many other SQL commands.
It is given its own section in this document because it is not
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<a href="json1.html">JSON functions</a> are documented separately.  An
application may define additional
functions written in C and added to the database engine using
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<a href="lang_aggfunc.html">aggregate functions</a>, and
<a href="json1.html">JSON functions</a> are documented separately.  An
application may define additional
functions written in C and added to the database engine using
the <a href="c3ref/create_function.html">sqlite3_create_function()</a> API.</p>

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<dt><p><b>abs(<i>X</i>)</b></dt><dd><p>
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<dl>
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<dt><p><b>abs(<i>X</i>)</b></dt><dd><p>
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  argument X.  Abs(X) returns NULL if X is NULL. 
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b.innerHTML='hide';
}
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}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>CREATE INDEX</h2></div><p><b><a href="syntax/create-index-stmt.html">create-index-stmt:</a></b>
<button id='x825' onclick='hideorshow("x825","x826")'>hide</button></p>
 <div id='x826' class='imgcontainer'>
 <img alt="syntax diagram create-index-stmt" src="images/syntax/create-index-stmt.gif" />
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x827' onclick='hideorshow("x827","x828")'>show</button></p>
 <div id='x828' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x829' onclick='hideorshow("x829","x830")'>show</button></p>
 <div id='x830' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x831' onclick='hideorshow("x831","x832")'>show</button></p>
 <div id='x832' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x833' onclick='hideorshow("x833","x834")'>show</button></p>
 <div id='x834' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x835' onclick='hideorshow("x835","x836")'>show</button></p>
 <div id='x836' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x837' onclick='hideorshow("x837","x838")'>show</button></p>
 <div id='x838' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x839' onclick='hideorshow("x839","x840")'>show</button></p>
 <div id='x840' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x841' onclick='hideorshow("x841","x842")'>show</button></p>
 <div id='x842' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x843' onclick='hideorshow("x843","x844")'>show</button></p>
 <div id='x844' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x845' onclick='hideorshow("x845","x846")'>show</button></p>
 <div id='x846' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x847' onclick='hideorshow("x847","x848")'>show</button></p>
 <div id='x848' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x849' onclick='hideorshow("x849","x850")'>show</button></p>
 <div id='x850' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x851' onclick='hideorshow("x851","x852")'>show</button></p>
 <div id='x852' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x853' onclick='hideorshow("x853","x854")'>show</button></p>
 <div id='x854' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/indexed-column.html">indexed-column:</a></b>
<button id='x855' onclick='hideorshow("x855","x856")'>show</button></p>
 <div id='x856' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram indexed-column" src="images/syntax/indexed-column.gif" />
</div>
</div>


<p>The CREATE INDEX command consists of the keywords "CREATE INDEX" followed
by the name of the new index, the keyword "ON", the name of a previously
created table that is to be indexed, and a parenthesized list of table column
names and/or expressions that are used for the index key.
If the optional WHERE clause is included, then the index is a "<a href="partialindex.html">partial index</a>".
</p>

<a name="descidx"></a>

<p>Each column name or expression can be followed by one
of the "ASC" or "DESC" keywords to indicate sort order.
The sort order may or may not be ignored depending
on the database file format, and in particular the <a href="fileformat2.html#schemaformat">schema format number</a>.
The "legacy" schema format (1) ignores index
sort order.  The descending index schema format (4) takes index sort order
into account.  Only versions of SQLite 3.3.0 and later are able to understand

the descending index format. For compatibility, version of SQLite between 3.3.0
and 3.7.9 use the legacy schema format by default.  The newer schema format is
used by default in version 3.7.10 and later.
The <a href="pragma.html#pragma_legacy_file_format">legacy_file_format pragma</a> can be used to change set the specific
behavior for any version of SQLite.</p>



<p>The COLLATE clause optionally following each column name
or expression defines a
collating sequence used for text entries in that column.
The default collating
sequence is the collating sequence defined for that column in the
<a href="lang_createtable.html">CREATE TABLE</a> statement.  Or if no collating sequence is otherwise defined,
the built-in BINARY collating sequence is used.</p>

<a name="indexexpr"></a>

<p>Expressions in an index may not reference other tables
and may not use subqueries nor functions whose result might
change (ex: <a href="lang_corefunc.html#random">random()</a> or <a href="lang_corefunc.html#sqlite_version">sqlite_version()</a>).
Expressions in an index may only refer to columns in the table
that is being indexed.
Indexes on expression will not work with versions of SQLite prior
to <a href="releaselog/3_9_0.html">version 3.9.0</a>.
See the <a href="expridx.html">Indexes On Expressions</a> document for additional information
about using general expressions in CREATE INDEX statements.

<p>There are no arbitrary limits on the number of indices that can be
attached to a single table.  The number of columns in an index is 
limited to the value set by
<a href="c3ref/limit.html">sqlite3_limit</a>(<a href="c3ref/c_limit_attached.html#sqlitelimitcolumn">SQLITE_LIMIT_COLUMN</a>,...).</p>







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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>CREATE INDEX</h2></div><p><b><a href="syntax/create-index-stmt.html">create-index-stmt:</a></b>
<button id='x829' onclick='hideorshow("x829","x830")'>hide</button></p>
 <div id='x830' class='imgcontainer'>
 <img alt="syntax diagram create-index-stmt" src="images/syntax/create-index-stmt.gif" />
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x831' onclick='hideorshow("x831","x832")'>show</button></p>
 <div id='x832' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x833' onclick='hideorshow("x833","x834")'>show</button></p>
 <div id='x834' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x835' onclick='hideorshow("x835","x836")'>show</button></p>
 <div id='x836' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x837' onclick='hideorshow("x837","x838")'>show</button></p>
 <div id='x838' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x839' onclick='hideorshow("x839","x840")'>show</button></p>
 <div id='x840' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x841' onclick='hideorshow("x841","x842")'>show</button></p>
 <div id='x842' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x843' onclick='hideorshow("x843","x844")'>show</button></p>
 <div id='x844' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x845' onclick='hideorshow("x845","x846")'>show</button></p>
 <div id='x846' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x847' onclick='hideorshow("x847","x848")'>show</button></p>
 <div id='x848' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x849' onclick='hideorshow("x849","x850")'>show</button></p>
 <div id='x850' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x851' onclick='hideorshow("x851","x852")'>show</button></p>
 <div id='x852' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x853' onclick='hideorshow("x853","x854")'>show</button></p>
 <div id='x854' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x855' onclick='hideorshow("x855","x856")'>show</button></p>
 <div id='x856' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x857' onclick='hideorshow("x857","x858")'>show</button></p>
 <div id='x858' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/indexed-column.html">indexed-column:</a></b>
<button id='x859' onclick='hideorshow("x859","x860")'>show</button></p>
 <div id='x860' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram indexed-column" src="images/syntax/indexed-column.gif" />
</div>
</div>


<p>The CREATE INDEX command consists of the keywords "CREATE INDEX" followed
by the name of the new index, the keyword "ON", the name of a previously
created table that is to be indexed, and a parenthesized list of table column
names and/or expressions that are used for the index key.
If the optional WHERE clause is included, then the index is a "<a href="partialindex.html">partial index</a>".
</p>

<a name="descidx"></a>

<p>Each column name or expression can be followed by one
of the "ASC" or "DESC" keywords to indicate sort order.
The sort order may or may not be ignored depending
on the database file format, and in particular the <a href="fileformat2.html#schemaformat">schema format number</a>.
The "legacy" schema format (1) ignores index
sort order.  The descending index schema format (4) takes index sort order
into account.  Only versions of SQLite 3.3.0 (2006-01-11)
and later are able to understand
the descending index format. For compatibility, version of SQLite between 3.3.0
and 3.7.9 use the legacy schema format by default.  The newer schema format is
used by default in version 3.7.10 (2012-01-16) and later.
The <a href="pragma.html#pragma_legacy_file_format">legacy_file_format pragma</a> can be used to change set the specific
behavior for any version of SQLite.</p>

<a name="collidx"></a>

<p>The COLLATE clause optionally following each column name
or expression defines a
collating sequence used for text entries in that column.
The default collating
sequence is the collating sequence defined for that column in the
<a href="lang_createtable.html">CREATE TABLE</a> statement.  Or if no collating sequence is otherwise defined,
the built-in BINARY collating sequence is used.</p>

<a name="indexexpr"></a>

<p>Expressions in an index may not reference other tables
and may not use subqueries nor functions whose result might
change (ex: <a href="lang_corefunc.html#random">random()</a> or <a href="lang_corefunc.html#sqlite_version">sqlite_version()</a>).
Expressions in an index may only refer to columns in the table
that is being indexed.
Indexes on expression will not work with versions of SQLite prior
to <a href="releaselog/3_9_0.html">version 3.9.0</a> (2015-10-14).
See the <a href="expridx.html">Indexes On Expressions</a> document for additional information
about using general expressions in CREATE INDEX statements.

<p>There are no arbitrary limits on the number of indices that can be
attached to a single table.  The number of columns in an index is 
limited to the value set by
<a href="c3ref/limit.html">sqlite3_limit</a>(<a href="c3ref/c_limit_attached.html#sqlitelimitcolumn">SQLITE_LIMIT_COLUMN</a>,...).</p>
Changes to Doc/Extra/Core/lang_createtable.html.
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<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
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<li><a href='docs.html'>Documentation</a>

<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
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<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>
<li><a href='about.html'>About</a>
<li><a href='docs.html'>Documentation</a>
<li><a href='download.html'>Download</a>
<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
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<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">
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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>CREATE TABLE</h2></div><p><b><a href="syntax/create-table-stmt.html">create-table-stmt:</a></b>
<button id='x857' onclick='hideorshow("x857","x858")'>hide</button></p>
 <div id='x858' class='imgcontainer'>
 <img alt="syntax diagram create-table-stmt" src="images/syntax/create-table-stmt.gif" />
<p><b><a href="syntax/column-def.html">column-def:</a></b>
<button id='x859' onclick='hideorshow("x859","x860")'>show</button></p>
 <div id='x860' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram column-def" src="images/syntax/column-def.gif" />
<p><b><a href="syntax/column-constraint.html">column-constraint:</a></b>
<button id='x861' onclick='hideorshow("x861","x862")'>show</button></p>
 <div id='x862' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram column-constraint" src="images/syntax/column-constraint.gif" />
<p><b><a href="syntax/conflict-clause.html">conflict-clause:</a></b>
<button id='x863' onclick='hideorshow("x863","x864")'>show</button></p>
 <div id='x864' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram conflict-clause" src="images/syntax/conflict-clause.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x865' onclick='hideorshow("x865","x866")'>show</button></p>
 <div id='x866' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x867' onclick='hideorshow("x867","x868")'>show</button></p>
 <div id='x868' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
</div>
<p><b><a href="syntax/foreign-key-clause.html">foreign-key-clause:</a></b>
<button id='x869' onclick='hideorshow("x869","x870")'>show</button></p>
 <div id='x870' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram foreign-key-clause" src="images/syntax/foreign-key-clause.gif" />
</div>
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x871' onclick='hideorshow("x871","x872")'>show</button></p>
 <div id='x872' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x873' onclick='hideorshow("x873","x874")'>show</button></p>
 <div id='x874' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x875' onclick='hideorshow("x875","x876")'>show</button></p>
 <div id='x876' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x877' onclick='hideorshow("x877","x878")'>show</button></p>
 <div id='x878' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>








</div>


<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x879' onclick='hideorshow("x879","x880")'>show</button></p>
 <div id='x880' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x881' onclick='hideorshow("x881","x882")'>show</button></p>
 <div id='x882' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x883' onclick='hideorshow("x883","x884")'>show</button></p>
 <div id='x884' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x885' onclick='hideorshow("x885","x886")'>show</button></p>
 <div id='x886' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x887' onclick='hideorshow("x887","x888")'>show</button></p>
 <div id='x888' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x889' onclick='hideorshow("x889","x890")'>show</button></p>
 <div id='x890' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x891' onclick='hideorshow("x891","x892")'>show</button></p>
 <div id='x892' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x893' onclick='hideorshow("x893","x894")'>show</button></p>
 <div id='x894' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x895' onclick='hideorshow("x895","x896")'>show</button></p>
 <div id='x896' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x897' onclick='hideorshow("x897","x898")'>show</button></p>
 <div id='x898' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x899' onclick='hideorshow("x899","x900")'>show</button></p>
 <div id='x900' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x901' onclick='hideorshow("x901","x902")'>show</button></p>
 <div id='x902' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x903' onclick='hideorshow("x903","x904")'>show</button></p>
 <div id='x904' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x905' onclick='hideorshow("x905","x906")'>show</button></p>
 <div id='x906' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/table-constraint.html">table-constraint:</a></b>
<button id='x907' onclick='hideorshow("x907","x908")'>show</button></p>
 <div id='x908' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-constraint" src="images/syntax/table-constraint.gif" />
<p><b><a href="syntax/conflict-clause.html">conflict-clause:</a></b>
<button id='x909' onclick='hideorshow("x909","x910")'>show</button></p>
 <div id='x910' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram conflict-clause" src="images/syntax/conflict-clause.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x911' onclick='hideorshow("x911","x912")'>show</button></p>
 <div id='x912' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x913' onclick='hideorshow("x913","x914")'>show</button></p>
 <div id='x914' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x915' onclick='hideorshow("x915","x916")'>show</button></p>
 <div id='x916' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x917' onclick='hideorshow("x917","x918")'>show</button></p>
 <div id='x918' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x919' onclick='hideorshow("x919","x920")'>show</button></p>
 <div id='x920' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/foreign-key-clause.html">foreign-key-clause:</a></b>
<button id='x921' onclick='hideorshow("x921","x922")'>show</button></p>
 <div id='x922' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram foreign-key-clause" src="images/syntax/foreign-key-clause.gif" />
</div>
<p><b><a href="syntax/indexed-column.html">indexed-column:</a></b>
<button id='x923' onclick='hideorshow("x923","x924")'>show</button></p>
 <div id='x924' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram indexed-column" src="images/syntax/indexed-column.gif" />
</div>
</div>
</div>


<p>The "CREATE TABLE" command is used to create a new table in an SQLite 







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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>CREATE TABLE</h2></div><p><b><a href="syntax/create-table-stmt.html">create-table-stmt:</a></b>
<button id='x861' onclick='hideorshow("x861","x862")'>hide</button></p>
 <div id='x862' class='imgcontainer'>
 <img alt="syntax diagram create-table-stmt" src="images/syntax/create-table-stmt.gif" />
<p><b><a href="syntax/column-def.html">column-def:</a></b>
<button id='x863' onclick='hideorshow("x863","x864")'>show</button></p>
 <div id='x864' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram column-def" src="images/syntax/column-def.gif" />
<p><b><a href="syntax/column-constraint.html">column-constraint:</a></b>
<button id='x865' onclick='hideorshow("x865","x866")'>show</button></p>
 <div id='x866' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram column-constraint" src="images/syntax/column-constraint.gif" />
<p><b><a href="syntax/conflict-clause.html">conflict-clause:</a></b>
<button id='x867' onclick='hideorshow("x867","x868")'>show</button></p>
 <div id='x868' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram conflict-clause" src="images/syntax/conflict-clause.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x869' onclick='hideorshow("x869","x870")'>show</button></p>
 <div id='x870' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x871' onclick='hideorshow("x871","x872")'>show</button></p>
 <div id='x872' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
</div>
<p><b><a href="syntax/foreign-key-clause.html">foreign-key-clause:</a></b>
<button id='x873' onclick='hideorshow("x873","x874")'>show</button></p>
 <div id='x874' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram foreign-key-clause" src="images/syntax/foreign-key-clause.gif" />
</div>
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x875' onclick='hideorshow("x875","x876")'>show</button></p>
 <div id='x876' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>










<button id='x877' onclick='hideorshow("x877","x878")'>show</button></p>
 <div id='x878' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x879' onclick='hideorshow("x879","x880")'>show</button></p>
 <div id='x880' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x881' onclick='hideorshow("x881","x882")'>show</button></p>
 <div id='x882' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x883' onclick='hideorshow("x883","x884")'>show</button></p>
 <div id='x884' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x885' onclick='hideorshow("x885","x886")'>show</button></p>
 <div id='x886' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x887' onclick='hideorshow("x887","x888")'>show</button></p>
 <div id='x888' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x889' onclick='hideorshow("x889","x890")'>show</button></p>
 <div id='x890' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x891' onclick='hideorshow("x891","x892")'>show</button></p>
 <div id='x892' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x893' onclick='hideorshow("x893","x894")'>show</button></p>
 <div id='x894' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x895' onclick='hideorshow("x895","x896")'>show</button></p>
 <div id='x896' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x897' onclick='hideorshow("x897","x898")'>show</button></p>
 <div id='x898' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x899' onclick='hideorshow("x899","x900")'>show</button></p>
 <div id='x900' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x901' onclick='hideorshow("x901","x902")'>show</button></p>
 <div id='x902' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x903' onclick='hideorshow("x903","x904")'>show</button></p>
 <div id='x904' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x905' onclick='hideorshow("x905","x906")'>show</button></p>
 <div id='x906' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x907' onclick='hideorshow("x907","x908")'>show</button></p>
 <div id='x908' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x909' onclick='hideorshow("x909","x910")'>show</button></p>
 <div id='x910' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/table-constraint.html">table-constraint:</a></b>
<button id='x911' onclick='hideorshow("x911","x912")'>show</button></p>
 <div id='x912' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-constraint" src="images/syntax/table-constraint.gif" />
<p><b><a href="syntax/conflict-clause.html">conflict-clause:</a></b>
<button id='x913' onclick='hideorshow("x913","x914")'>show</button></p>
 <div id='x914' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram conflict-clause" src="images/syntax/conflict-clause.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x915' onclick='hideorshow("x915","x916")'>show</button></p>
 <div id='x916' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x917' onclick='hideorshow("x917","x918")'>show</button></p>
 <div id='x918' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x919' onclick='hideorshow("x919","x920")'>show</button></p>
 <div id='x920' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x921' onclick='hideorshow("x921","x922")'>show</button></p>
 <div id='x922' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x923' onclick='hideorshow("x923","x924")'>show</button></p>
 <div id='x924' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/foreign-key-clause.html">foreign-key-clause:</a></b>
<button id='x925' onclick='hideorshow("x925","x926")'>show</button></p>
 <div id='x926' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram foreign-key-clause" src="images/syntax/foreign-key-clause.gif" />
</div>
<p><b><a href="syntax/indexed-column.html">indexed-column:</a></b>
<button id='x927' onclick='hideorshow("x927","x928")'>show</button></p>
 <div id='x928' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram indexed-column" src="images/syntax/indexed-column.gif" />
</div>
</div>
</div>


<p>The "CREATE TABLE" command is used to create a new table in an SQLite 
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called the "rowid". The rowid value can be accessed using one of the special
case-independent names "rowid", "oid", or "_rowid_" in place of a column name.
If a table contains a user defined column named "rowid", "oid" or "_rowid_",
then that name always refers the explicitly declared column and cannot be used
to retrieve the integer rowid value.

<p>The rowid (and "oid" and "_rowid_") is omitted in <a href="withoutrowid.html">WITHOUT ROWID</a> tables.
WITHOUT ROWID tables are only available in SQLite <a href="releaselog/3_8_2.html">version 3.8.2</a> and later.

A table that lacks the WITHOUT ROWID clause is called a "rowid table".

<p>The data for rowid tables is stored as a B-Tree structure containing
one entry for each table row, using the rowid value as the key. This means that
retrieving or sorting records by rowid is fast. Searching for a record with a
specific rowid, or for all records with rowids within a specified range is
around twice as fast as a similar search made by specifying any other PRIMARY







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called the "rowid". The rowid value can be accessed using one of the special
case-independent names "rowid", "oid", or "_rowid_" in place of a column name.
If a table contains a user defined column named "rowid", "oid" or "_rowid_",
then that name always refers the explicitly declared column and cannot be used
to retrieve the integer rowid value.

<p>The rowid (and "oid" and "_rowid_") is omitted in <a href="withoutrowid.html">WITHOUT ROWID</a> tables.
WITHOUT ROWID tables are only available in SQLite <a href="releaselog/3_8_2.html">version 3.8.2</a>
(2013-12-06) and later.
A table that lacks the WITHOUT ROWID clause is called a "rowid table".

<p>The data for rowid tables is stored as a B-Tree structure containing
one entry for each table row, using the rowid value as the key. This means that
retrieving or sorting records by rowid is fast. Searching for a record with a
specific rowid, or for all records with rowids within a specified range is
around twice as fast as a similar search made by specifying any other PRIMARY
Changes to Doc/Extra/Core/lang_createtrigger.html.
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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>CREATE TRIGGER</h2></div><p><b><a href="syntax/create-trigger-stmt.html">create-trigger-stmt:</a></b>
<button id='x925' onclick='hideorshow("x925","x926")'>hide</button></p>
 <div id='x926' class='imgcontainer'>
 <img alt="syntax diagram create-trigger-stmt" src="images/syntax/create-trigger-stmt.gif" />
<p><b><a href="syntax/delete-stmt.html">delete-stmt:</a></b>
<button id='x927' onclick='hideorshow("x927","x928")'>show</button></p>
 <div id='x928' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram delete-stmt" src="images/syntax/delete-stmt.gif" />
<p><b><a href="syntax/qualified-table-name.html">qualified-table-name:</a></b>
<button id='x929' onclick='hideorshow("x929","x930")'>show</button></p>
 <div id='x930' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram qualified-table-name" src="images/syntax/qualified-table-name.gif" />
</div>
<p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x931' onclick='hideorshow("x931","x932")'>show</button></p>
 <div id='x932' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x933' onclick='hideorshow("x933","x934")'>show</button></p>
 <div id='x934' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x935' onclick='hideorshow("x935","x936")'>show</button></p>
 <div id='x936' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x937' onclick='hideorshow("x937","x938")'>show</button></p>
 <div id='x938' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x939' onclick='hideorshow("x939","x940")'>show</button></p>
 <div id='x940' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x941' onclick='hideorshow("x941","x942")'>show</button></p>
 <div id='x942' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x943' onclick='hideorshow("x943","x944")'>show</button></p>
 <div id='x944' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/insert-stmt.html">insert-stmt:</a></b>
<button id='x945' onclick='hideorshow("x945","x946")'>show</button></p>
 <div id='x946' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram insert-stmt" src="images/syntax/insert-stmt.gif" />
<p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x947' onclick='hideorshow("x947","x948")'>show</button></p>
 <div id='x948' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x949' onclick='hideorshow("x949","x950")'>show</button></p>
 <div id='x950' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x951' onclick='hideorshow("x951","x952")'>show</button></p>
 <div id='x952' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x953' onclick='hideorshow("x953","x954")'>show</button></p>
 <div id='x954' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x955' onclick='hideorshow("x955","x956")'>show</button></p>
 <div id='x956' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x957' onclick='hideorshow("x957","x958")'>show</button></p>
 <div id='x958' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x959' onclick='hideorshow("x959","x960")'>show</button></p>
 <div id='x960' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x961' onclick='hideorshow("x961","x962")'>show</button></p>
 <div id='x962' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x963' onclick='hideorshow("x963","x964")'>show</button></p>
 <div id='x964' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x965' onclick='hideorshow("x965","x966")'>show</button></p>
 <div id='x966' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x967' onclick='hideorshow("x967","x968")'>show</button></p>
 <div id='x968' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/update-stmt.html">update-stmt:</a></b>
<button id='x969' onclick='hideorshow("x969","x970")'>show</button></p>
 <div id='x970' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram update-stmt" src="images/syntax/update-stmt.gif" />





<p><b><a href="syntax/qualified-table-name.html">qualified-table-name:</a></b>
<button id='x971' onclick='hideorshow("x971","x972")'>show</button></p>
 <div id='x972' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram qualified-table-name" src="images/syntax/qualified-table-name.gif" />
</div>
<p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x973' onclick='hideorshow("x973","x974")'>show</button></p>
 <div id='x974' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x975' onclick='hideorshow("x975","x976")'>show</button></p>
 <div id='x976' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>CREATE TRIGGER</h2></div><p><b><a href="syntax/create-trigger-stmt.html">create-trigger-stmt:</a></b>
<button id='x929' onclick='hideorshow("x929","x930")'>hide</button></p>
 <div id='x930' class='imgcontainer'>
 <img alt="syntax diagram create-trigger-stmt" src="images/syntax/create-trigger-stmt.gif" />
<p><b><a href="syntax/delete-stmt.html">delete-stmt:</a></b>
<button id='x931' onclick='hideorshow("x931","x932")'>show</button></p>
 <div id='x932' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram delete-stmt" src="images/syntax/delete-stmt.gif" />
<p><b><a href="syntax/qualified-table-name.html">qualified-table-name:</a></b>
<button id='x933' onclick='hideorshow("x933","x934")'>show</button></p>
 <div id='x934' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram qualified-table-name" src="images/syntax/qualified-table-name.gif" />
</div>
<p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x935' onclick='hideorshow("x935","x936")'>show</button></p>
 <div id='x936' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x937' onclick='hideorshow("x937","x938")'>show</button></p>
 <div id='x938' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x939' onclick='hideorshow("x939","x940")'>show</button></p>
 <div id='x940' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x941' onclick='hideorshow("x941","x942")'>show</button></p>
 <div id='x942' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x943' onclick='hideorshow("x943","x944")'>show</button></p>
 <div id='x944' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x945' onclick='hideorshow("x945","x946")'>show</button></p>
 <div id='x946' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x947' onclick='hideorshow("x947","x948")'>show</button></p>
 <div id='x948' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/insert-stmt.html">insert-stmt:</a></b>
<button id='x949' onclick='hideorshow("x949","x950")'>show</button></p>
 <div id='x950' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram insert-stmt" src="images/syntax/insert-stmt.gif" />
<p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x951' onclick='hideorshow("x951","x952")'>show</button></p>
 <div id='x952' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x953' onclick='hideorshow("x953","x954")'>show</button></p>
 <div id='x954' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x955' onclick='hideorshow("x955","x956")'>show</button></p>
 <div id='x956' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x957' onclick='hideorshow("x957","x958")'>show</button></p>
 <div id='x958' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x959' onclick='hideorshow("x959","x960")'>show</button></p>
 <div id='x960' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x961' onclick='hideorshow("x961","x962")'>show</button></p>
 <div id='x962' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x963' onclick='hideorshow("x963","x964")'>show</button></p>
 <div id='x964' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x965' onclick='hideorshow("x965","x966")'>show</button></p>
 <div id='x966' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x967' onclick='hideorshow("x967","x968")'>show</button></p>
 <div id='x968' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x969' onclick='hideorshow("x969","x970")'>show</button></p>
 <div id='x970' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x971' onclick='hideorshow("x971","x972")'>show</button></p>
 <div id='x972' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/update-stmt.html">update-stmt:</a></b>
<button id='x973' onclick='hideorshow("x973","x974")'>show</button></p>
 <div id='x974' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram update-stmt" src="images/syntax/update-stmt.gif" />
<p><b><a href="syntax/column-name-list.html">column-name-list:</a></b>
<button id='x975' onclick='hideorshow("x975","x976")'>show</button></p>
 <div id='x976' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram column-name-list" src="images/syntax/column-name-list.gif" />
</div>
<p><b><a href="syntax/qualified-table-name.html">qualified-table-name:</a></b>
<button id='x977' onclick='hideorshow("x977","x978")'>show</button></p>
 <div id='x978' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram qualified-table-name" src="images/syntax/qualified-table-name.gif" />
</div>
<p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x979' onclick='hideorshow("x979","x980")'>show</button></p>
 <div id='x980' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x981' onclick='hideorshow("x981","x982")'>show</button></p>
 <div id='x982' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
</div>
</div>
</div>


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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>CREATE VIEW</h2></div><p><b><a href="syntax/create-view-stmt.html">create-view-stmt:</a></b>
<button id='x977' onclick='hideorshow("x977","x978")'>hide</button></p>
 <div id='x978' class='imgcontainer'>
 <img alt="syntax diagram create-view-stmt" src="images/syntax/create-view-stmt.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x979' onclick='hideorshow("x979","x980")'>show</button></p>
 <div id='x980' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x981' onclick='hideorshow("x981","x982")'>show</button></p>
 <div id='x982' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x983' onclick='hideorshow("x983","x984")'>show</button></p>
 <div id='x984' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x985' onclick='hideorshow("x985","x986")'>show</button></p>
 <div id='x986' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x987' onclick='hideorshow("x987","x988")'>show</button></p>
 <div id='x988' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x989' onclick='hideorshow("x989","x990")'>show</button></p>
 <div id='x990' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x991' onclick='hideorshow("x991","x992")'>show</button></p>
 <div id='x992' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x993' onclick='hideorshow("x993","x994")'>show</button></p>
 <div id='x994' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x995' onclick='hideorshow("x995","x996")'>show</button></p>
 <div id='x996' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x997' onclick='hideorshow("x997","x998")'>show</button></p>
 <div id='x998' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x999' onclick='hideorshow("x999","x1000")'>show</button></p>
 <div id='x1000' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1001' onclick='hideorshow("x1001","x1002")'>show</button></p>
 <div id='x1002' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1003' onclick='hideorshow("x1003","x1004")'>show</button></p>
 <div id='x1004' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1005' onclick='hideorshow("x1005","x1006")'>show</button></p>
 <div id='x1006' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>


<p>The CREATE VIEW command assigns a name to a pre-packaged 







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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>CREATE VIEW</h2></div><p><b><a href="syntax/create-view-stmt.html">create-view-stmt:</a></b>
<button id='x983' onclick='hideorshow("x983","x984")'>hide</button></p>
 <div id='x984' class='imgcontainer'>
 <img alt="syntax diagram create-view-stmt" src="images/syntax/create-view-stmt.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x985' onclick='hideorshow("x985","x986")'>show</button></p>
 <div id='x986' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x987' onclick='hideorshow("x987","x988")'>show</button></p>
 <div id='x988' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x989' onclick='hideorshow("x989","x990")'>show</button></p>
 <div id='x990' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x991' onclick='hideorshow("x991","x992")'>show</button></p>
 <div id='x992' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x993' onclick='hideorshow("x993","x994")'>show</button></p>
 <div id='x994' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x995' onclick='hideorshow("x995","x996")'>show</button></p>
 <div id='x996' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x997' onclick='hideorshow("x997","x998")'>show</button></p>
 <div id='x998' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x999' onclick='hideorshow("x999","x1000")'>show</button></p>
 <div id='x1000' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1001' onclick='hideorshow("x1001","x1002")'>show</button></p>
 <div id='x1002' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1003' onclick='hideorshow("x1003","x1004")'>show</button></p>
 <div id='x1004' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1005' onclick='hideorshow("x1005","x1006")'>show</button></p>
 <div id='x1006' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1007' onclick='hideorshow("x1007","x1008")'>show</button></p>
 <div id='x1008' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1009' onclick='hideorshow("x1009","x1010")'>show</button></p>
 <div id='x1010' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1011' onclick='hideorshow("x1011","x1012")'>show</button></p>
 <div id='x1012' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>


<p>The CREATE VIEW command assigns a name to a pre-packaged 
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<p>If a <span class='yyterm'>column-name</span> list follows 
the <span class='yyterm'>view-name</span>, then that list determines
the names of the columns for the view.  If the <span class='yyterm'>column-name</span>
list is omitted, then the names of the columns in the view are derived
from the names of the result-set columns in the <a href="syntax/select-stmt.html">select-stmt</a>.
Note that the <span class='yyterm'>column-name</span> list syntax is only
supported in SQLite versions 3.9.0 and later.









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<p>If a <span class='yyterm'>column-name</span> list follows 
the <span class='yyterm'>view-name</span>, then that list determines
the names of the columns for the view.  If the <span class='yyterm'>column-name</span>
list is omitted, then the names of the columns in the view are derived
from the names of the result-set columns in the <a href="syntax/select-stmt.html">select-stmt</a>.
Note that the <span class='yyterm'>column-name</span> list syntax is only
supported in SQLite versions 3.9.0 (2015-10-14) and later.


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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>CREATE VIRTUAL TABLE</h2></div><p><b><a href="syntax/create-virtual-table-stmt.html">create-virtual-table-stmt:</a></b>
<button id='x1007' onclick='hideorshow("x1007","x1008")'>hide</button></p>
 <div id='x1008' class='imgcontainer'>
 <img alt="syntax diagram create-virtual-table-stmt" src="images/syntax/create-virtual-table-stmt.gif" />
</div>


<p>A <a href="vtab.html">virtual table</a> is an interface to an external storage or computation
engine that appears to be a table but does not actually store information
in the database file.</p>







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}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>CREATE VIRTUAL TABLE</h2></div><p><b><a href="syntax/create-virtual-table-stmt.html">create-virtual-table-stmt:</a></b>
<button id='x1013' onclick='hideorshow("x1013","x1014")'>hide</button></p>
 <div id='x1014' class='imgcontainer'>
 <img alt="syntax diagram create-virtual-table-stmt" src="images/syntax/create-virtual-table-stmt.gif" />
</div>


<p>A <a href="vtab.html">virtual table</a> is an interface to an external storage or computation
engine that appears to be a table but does not actually store information
in the database file.</p>
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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>DELETE</h2></div><p><b><a href="syntax/delete-stmt.html">delete-stmt:</a></b>
<button id='x1009' onclick='hideorshow("x1009","x1010")'>hide</button></p>
 <div id='x1010' class='imgcontainer'>
 <img alt="syntax diagram delete-stmt" src="images/syntax/delete-stmt.gif" />
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1011' onclick='hideorshow("x1011","x1012")'>show</button></p>
 <div id='x1012' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1013' onclick='hideorshow("x1013","x1014")'>show</button></p>
 <div id='x1014' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1015' onclick='hideorshow("x1015","x1016")'>show</button></p>
 <div id='x1016' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1017' onclick='hideorshow("x1017","x1018")'>show</button></p>
 <div id='x1018' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1019' onclick='hideorshow("x1019","x1020")'>show</button></p>
 <div id='x1020' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1021' onclick='hideorshow("x1021","x1022")'>show</button></p>
 <div id='x1022' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1023' onclick='hideorshow("x1023","x1024")'>show</button></p>
 <div id='x1024' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1025' onclick='hideorshow("x1025","x1026")'>show</button></p>
 <div id='x1026' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1027' onclick='hideorshow("x1027","x1028")'>show</button></p>
 <div id='x1028' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1029' onclick='hideorshow("x1029","x1030")'>show</button></p>
 <div id='x1030' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1031' onclick='hideorshow("x1031","x1032")'>show</button></p>
 <div id='x1032' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1033' onclick='hideorshow("x1033","x1034")'>show</button></p>
 <div id='x1034' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1035' onclick='hideorshow("x1035","x1036")'>show</button></p>
 <div id='x1036' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1037' onclick='hideorshow("x1037","x1038")'>show</button></p>
 <div id='x1038' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/qualified-table-name.html">qualified-table-name:</a></b>
<button id='x1039' onclick='hideorshow("x1039","x1040")'>show</button></p>
 <div id='x1040' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram qualified-table-name" src="images/syntax/qualified-table-name.gif" />
</div>
<p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x1041' onclick='hideorshow("x1041","x1042")'>show</button></p>
 <div id='x1042' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x1043' onclick='hideorshow("x1043","x1044")'>show</button></p>
 <div id='x1044' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1045' onclick='hideorshow("x1045","x1046")'>show</button></p>
 <div id='x1046' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1047' onclick='hideorshow("x1047","x1048")'>show</button></p>
 <div id='x1048' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1049' onclick='hideorshow("x1049","x1050")'>show</button></p>
 <div id='x1050' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1051' onclick='hideorshow("x1051","x1052")'>show</button></p>
 <div id='x1052' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1053' onclick='hideorshow("x1053","x1054")'>show</button></p>
 <div id='x1054' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1055' onclick='hideorshow("x1055","x1056")'>show</button></p>
 <div id='x1056' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1057' onclick='hideorshow("x1057","x1058")'>show</button></p>
 <div id='x1058' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1059' onclick='hideorshow("x1059","x1060")'>show</button></p>
 <div id='x1060' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1061' onclick='hideorshow("x1061","x1062")'>show</button></p>
 <div id='x1062' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>
</div>









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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>DELETE</h2></div><p><b><a href="syntax/delete-stmt.html">delete-stmt:</a></b>
<button id='x1015' onclick='hideorshow("x1015","x1016")'>hide</button></p>
 <div id='x1016' class='imgcontainer'>
 <img alt="syntax diagram delete-stmt" src="images/syntax/delete-stmt.gif" />
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1017' onclick='hideorshow("x1017","x1018")'>show</button></p>
 <div id='x1018' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1019' onclick='hideorshow("x1019","x1020")'>show</button></p>
 <div id='x1020' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1021' onclick='hideorshow("x1021","x1022")'>show</button></p>
 <div id='x1022' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1023' onclick='hideorshow("x1023","x1024")'>show</button></p>
 <div id='x1024' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1025' onclick='hideorshow("x1025","x1026")'>show</button></p>
 <div id='x1026' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1027' onclick='hideorshow("x1027","x1028")'>show</button></p>
 <div id='x1028' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1029' onclick='hideorshow("x1029","x1030")'>show</button></p>
 <div id='x1030' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1031' onclick='hideorshow("x1031","x1032")'>show</button></p>
 <div id='x1032' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1033' onclick='hideorshow("x1033","x1034")'>show</button></p>
 <div id='x1034' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1035' onclick='hideorshow("x1035","x1036")'>show</button></p>
 <div id='x1036' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1037' onclick='hideorshow("x1037","x1038")'>show</button></p>
 <div id='x1038' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1039' onclick='hideorshow("x1039","x1040")'>show</button></p>
 <div id='x1040' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1041' onclick='hideorshow("x1041","x1042")'>show</button></p>
 <div id='x1042' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1043' onclick='hideorshow("x1043","x1044")'>show</button></p>
 <div id='x1044' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/qualified-table-name.html">qualified-table-name:</a></b>
<button id='x1045' onclick='hideorshow("x1045","x1046")'>show</button></p>
 <div id='x1046' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram qualified-table-name" src="images/syntax/qualified-table-name.gif" />
</div>
<p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x1047' onclick='hideorshow("x1047","x1048")'>show</button></p>
 <div id='x1048' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x1049' onclick='hideorshow("x1049","x1050")'>show</button></p>
 <div id='x1050' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1051' onclick='hideorshow("x1051","x1052")'>show</button></p>
 <div id='x1052' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1053' onclick='hideorshow("x1053","x1054")'>show</button></p>
 <div id='x1054' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1055' onclick='hideorshow("x1055","x1056")'>show</button></p>
 <div id='x1056' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1057' onclick='hideorshow("x1057","x1058")'>show</button></p>
 <div id='x1058' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1059' onclick='hideorshow("x1059","x1060")'>show</button></p>
 <div id='x1060' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1061' onclick='hideorshow("x1061","x1062")'>show</button></p>
 <div id='x1062' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1063' onclick='hideorshow("x1063","x1064")'>show</button></p>
 <div id='x1064' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1065' onclick='hideorshow("x1065","x1066")'>show</button></p>
 <div id='x1066' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1067' onclick='hideorshow("x1067","x1068")'>show</button></p>
 <div id='x1068' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>
</div>


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<h3>The Truncate Optimization</h3>

<p>When the WHERE is omitted from a DELETE statement and the table
being deleted has no triggers,
SQLite uses an optimization to erase the entire table content
without having to visit each row of the table individually.
This "truncate" optimization makes the delete run much faster.
Prior to SQLite <a href="releaselog/3_6_5.html">version 3.6.5</a>, the truncate optimization
also meant that the <a href="c3ref/changes.html">sqlite3_changes()</a> and
<a href="c3ref/total_changes.html">sqlite3_total_changes()</a> interfaces
and the <a href="pragma.html#pragma_count_changes">count_changes pragma</a>
will not actually return the number of deleted rows.  
That problem has been fixed as of <a href="releaselog/3_6_5.html">version 3.6.5</a>.

<p>The truncate optimization can be permanently disabled for all queries
by recompiling
SQLite with the <a href="compile.html#omit_truncate_optimization">SQLITE_OMIT_TRUNCATE_OPTIMIZATION</a> compile-time switch.</p>

<p>The truncate optimization can also be disabled at runtime using
the <a href="c3ref/set_authorizer.html">sqlite3_set_authorizer()</a> interface.  If an authorizer callback
returns <a href="c3ref/c_deny.html">SQLITE_IGNORE</a> for an <a href="c3ref/c_alter_table.html">SQLITE_DELETE</a> action code, then
the DELETE operation will proceed but the truncate optimization will
be bypassed and rows will be deleted one by one.</p>









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<h3>The Truncate Optimization</h3>

<p>When the WHERE is omitted from a DELETE statement and the table
being deleted has no triggers,
SQLite uses an optimization to erase the entire table content
without having to visit each row of the table individually.
This "truncate" optimization makes the delete run much faster.
Prior to SQLite <a href="releaselog/3_6_5.html">version 3.6.5</a> (2008-11-12), the truncate optimization
also meant that the <a href="c3ref/changes.html">sqlite3_changes()</a> and
<a href="c3ref/total_changes.html">sqlite3_total_changes()</a> interfaces
and the <a href="pragma.html#pragma_count_changes">count_changes pragma</a>
will not actually return the number of deleted rows.  
That problem has been fixed as of <a href="releaselog/3_6_5.html">version 3.6.5</a> (2008-11-12).

<p>The truncate optimization can be permanently disabled for all queries
by recompiling
SQLite with the <a href="compile.html#omit_truncate_optimization">SQLITE_OMIT_TRUNCATE_OPTIMIZATION</a> compile-time switch.</p>

<p>The truncate optimization can also be disabled at runtime using
the <a href="c3ref/set_authorizer.html">sqlite3_set_authorizer()</a> interface.  If an authorizer callback
returns <a href="c3ref/c_deny.html">SQLITE_IGNORE</a> for an <a href="c3ref/c_alter_table.html">SQLITE_DELETE</a> action code, then
the DELETE operation will proceed but the truncate optimization will
be bypassed and rows will be deleted one by one.</p>


Changes to Doc/Extra/Core/lang_detach.html.
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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>

<li><a href='docs.html'>Documentation</a>

<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">







>

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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>
<li><a href='about.html'>About</a>
<li><a href='docs.html'>Documentation</a>
<li><a href='download.html'>Download</a>
<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">
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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>DETACH DATABASE</h2></div><p><b><a href="syntax/detach-stmt.html">detach-stmt:</a></b>
<button id='x1063' onclick='hideorshow("x1063","x1064")'>hide</button></p>
 <div id='x1064' class='imgcontainer'>
 <img alt="syntax diagram detach-stmt" src="images/syntax/detach-stmt.gif" />
</div>


<p>This statement detaches an additional database connection previously 
attached using the <a href="lang_attach.html">ATTACH</a> statement.  
When not in <a href="sharedcache.html">shared cache mode</a>, 







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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>DETACH DATABASE</h2></div><p><b><a href="syntax/detach-stmt.html">detach-stmt:</a></b>
<button id='x1069' onclick='hideorshow("x1069","x1070")'>hide</button></p>
 <div id='x1070' class='imgcontainer'>
 <img alt="syntax diagram detach-stmt" src="images/syntax/detach-stmt.gif" />
</div>


<p>This statement detaches an additional database connection previously 
attached using the <a href="lang_attach.html">ATTACH</a> statement.  
When not in <a href="sharedcache.html">shared cache mode</a>, 
Changes to Doc/Extra/Core/lang_dropindex.html.
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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>

<li><a href='docs.html'>Documentation</a>

<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">







>

>







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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>DROP INDEX</h2></div><p><b><a href="syntax/drop-index-stmt.html">drop-index-stmt:</a></b>
<button id='x1065' onclick='hideorshow("x1065","x1066")'>hide</button></p>
 <div id='x1066' class='imgcontainer'>
 <img alt="syntax diagram drop-index-stmt" src="images/syntax/drop-index-stmt.gif" />
</div>


<p>The DROP INDEX statement removes an index added
with the <a href="lang_createindex.html">CREATE INDEX</a> statement.  The index is completely removed from
the disk.  The only way to recover the index is to reenter the
appropriate <a href="lang_createindex.html">CREATE INDEX</a> command.</p>









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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>DROP INDEX</h2></div><p><b><a href="syntax/drop-index-stmt.html">drop-index-stmt:</a></b>
<button id='x1071' onclick='hideorshow("x1071","x1072")'>hide</button></p>
 <div id='x1072' class='imgcontainer'>
 <img alt="syntax diagram drop-index-stmt" src="images/syntax/drop-index-stmt.gif" />
</div>


<p>The DROP INDEX statement removes an index added
with the <a href="lang_createindex.html">CREATE INDEX</a> statement.  The index is completely removed from
the disk.  The only way to recover the index is to reenter the
appropriate <a href="lang_createindex.html">CREATE INDEX</a> command.</p>


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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>DROP TABLE</h2></div><p><b><a href="syntax/drop-table-stmt.html">drop-table-stmt:</a></b>
<button id='x1067' onclick='hideorshow("x1067","x1068")'>hide</button></p>
 <div id='x1068' class='imgcontainer'>
 <img alt="syntax diagram drop-table-stmt" src="images/syntax/drop-table-stmt.gif" />
</div>


<p>The DROP TABLE statement removes a table added with the
<a href="lang_createtable.html">CREATE TABLE</a> statement.  The name specified is the
table name.  The dropped table is completely removed from the database 







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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>DROP TABLE</h2></div><p><b><a href="syntax/drop-table-stmt.html">drop-table-stmt:</a></b>
<button id='x1073' onclick='hideorshow("x1073","x1074")'>hide</button></p>
 <div id='x1074' class='imgcontainer'>
 <img alt="syntax diagram drop-table-stmt" src="images/syntax/drop-table-stmt.gif" />
</div>


<p>The DROP TABLE statement removes a table added with the
<a href="lang_createtable.html">CREATE TABLE</a> statement.  The name specified is the
table name.  The dropped table is completely removed from the database 
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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>DROP TRIGGER</h2></div><p><b><a href="syntax/drop-trigger-stmt.html">drop-trigger-stmt:</a></b>
<button id='x1069' onclick='hideorshow("x1069","x1070")'>hide</button></p>
 <div id='x1070' class='imgcontainer'>
 <img alt="syntax diagram drop-trigger-stmt" src="images/syntax/drop-trigger-stmt.gif" />
</div>


<p>The DROP TRIGGER statement removes a trigger created by the 
<a href="lang_createtrigger.html">CREATE TRIGGER</a> statement. Once removed, the trigger definition is no
longer present in the sqlite_master (or sqlite_temp_master) table and is
not fired by any subsequent INSERT, UPDATE or DELETE statements.

<p>Note that triggers are automatically dropped when the associated table is
dropped.









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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>DROP TRIGGER</h2></div><p><b><a href="syntax/drop-trigger-stmt.html">drop-trigger-stmt:</a></b>
<button id='x1075' onclick='hideorshow("x1075","x1076")'>hide</button></p>
 <div id='x1076' class='imgcontainer'>
 <img alt="syntax diagram drop-trigger-stmt" src="images/syntax/drop-trigger-stmt.gif" />
</div>


<p>The DROP TRIGGER statement removes a trigger created by the 
<a href="lang_createtrigger.html">CREATE TRIGGER</a> statement. Once removed, the trigger definition is no
longer present in the sqlite_master (or sqlite_temp_master) table and is
not fired by any subsequent INSERT, UPDATE or DELETE statements.

<p>Note that triggers are automatically dropped when the associated table is
dropped.


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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>DROP VIEW</h2></div><p><b><a href="syntax/drop-view-stmt.html">drop-view-stmt:</a></b>
<button id='x1071' onclick='hideorshow("x1071","x1072")'>hide</button></p>
 <div id='x1072' class='imgcontainer'>
 <img alt="syntax diagram drop-view-stmt" src="images/syntax/drop-view-stmt.gif" />
</div>


<p>The DROP VIEW statement removes a view created by the <a href="lang_createview.html">CREATE VIEW</a> 
  statement. The view definition is removed from the database schema, but 
  no actual data in the underlying base tables is modified.







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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>DROP VIEW</h2></div><p><b><a href="syntax/drop-view-stmt.html">drop-view-stmt:</a></b>
<button id='x1077' onclick='hideorshow("x1077","x1078")'>hide</button></p>
 <div id='x1078' class='imgcontainer'>
 <img alt="syntax diagram drop-view-stmt" src="images/syntax/drop-view-stmt.gif" />
</div>


<p>The DROP VIEW statement removes a view created by the <a href="lang_createview.html">CREATE VIEW</a> 
  statement. The view definition is removed from the database schema, but 
  no actual data in the underlying base tables is modified.
Changes to Doc/Extra/Core/lang_explain.html.
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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>expression</h2></div><p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1073' onclick='hideorshow("x1073","x1074")'>hide</button></p>
 <div id='x1074' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1075' onclick='hideorshow("x1075","x1076")'>show</button></p>
 <div id='x1076' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1077' onclick='hideorshow("x1077","x1078")'>show</button></p>
 <div id='x1078' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1079' onclick='hideorshow("x1079","x1080")'>show</button></p>
 <div id='x1080' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1081' onclick='hideorshow("x1081","x1082")'>show</button></p>
 <div id='x1082' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1083' onclick='hideorshow("x1083","x1084")'>show</button></p>
 <div id='x1084' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1085' onclick='hideorshow("x1085","x1086")'>show</button></p>
 <div id='x1086' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1087' onclick='hideorshow("x1087","x1088")'>show</button></p>
 <div id='x1088' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1089' onclick='hideorshow("x1089","x1090")'>show</button></p>
 <div id='x1090' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1091' onclick='hideorshow("x1091","x1092")'>show</button></p>
 <div id='x1092' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1093' onclick='hideorshow("x1093","x1094")'>show</button></p>
 <div id='x1094' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1095' onclick='hideorshow("x1095","x1096")'>show</button></p>
 <div id='x1096' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1097' onclick='hideorshow("x1097","x1098")'>show</button></p>
 <div id='x1098' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1099' onclick='hideorshow("x1099","x1100")'>show</button></p>
 <div id='x1100' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>


<p>This section is different from the others.  Most other sections of







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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>expression</h2></div><p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1079' onclick='hideorshow("x1079","x1080")'>hide</button></p>
 <div id='x1080' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1081' onclick='hideorshow("x1081","x1082")'>show</button></p>
 <div id='x1082' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1083' onclick='hideorshow("x1083","x1084")'>show</button></p>
 <div id='x1084' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1085' onclick='hideorshow("x1085","x1086")'>show</button></p>
 <div id='x1086' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1087' onclick='hideorshow("x1087","x1088")'>show</button></p>
 <div id='x1088' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1089' onclick='hideorshow("x1089","x1090")'>show</button></p>
 <div id='x1090' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1091' onclick='hideorshow("x1091","x1092")'>show</button></p>
 <div id='x1092' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1093' onclick='hideorshow("x1093","x1094")'>show</button></p>
 <div id='x1094' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1095' onclick='hideorshow("x1095","x1096")'>show</button></p>
 <div id='x1096' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1097' onclick='hideorshow("x1097","x1098")'>show</button></p>
 <div id='x1098' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1099' onclick='hideorshow("x1099","x1100")'>show</button></p>
 <div id='x1100' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1101' onclick='hideorshow("x1101","x1102")'>show</button></p>
 <div id='x1102' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1103' onclick='hideorshow("x1103","x1104")'>show</button></p>
 <div id='x1104' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1105' onclick='hideorshow("x1105","x1106")'>show</button></p>
 <div id='x1106' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>


<p>This section is different from the others.  Most other sections of
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<p>Hexadecimal integer literals follow the C-language notation of
"0x" or "0X" followed by hexadecimal digits.
For example, 0x1234 means the same as 4660
and 0x8000000000000000 means the same as -9223372036854775808.
 Hexadecimal integer literals are interpreted as 64-bit
two's-complement integers and are thus limited
to sixteen significant digits of precision.
Support for hexadecimal integers was added to SQLite version 3.8.6.

For backwards compatibility, the "0x" hexadecimal integer
notation is only understood by the SQL language parser, not by the
type conversions routines.
String variables that
contain text formatted like hexadecimal integers are not
interpreted as hexadecimal integers when coercing the string value
into an integer due to a <a href="lang_expr.html#castexpr">CAST expression</a> or for a <a href="datatype3.html#affinity">column affinity</a>







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<p>Hexadecimal integer literals follow the C-language notation of
"0x" or "0X" followed by hexadecimal digits.
For example, 0x1234 means the same as 4660
and 0x8000000000000000 means the same as -9223372036854775808.
 Hexadecimal integer literals are interpreted as 64-bit
two's-complement integers and are thus limited
to sixteen significant digits of precision.
Support for hexadecimal integers was added to SQLite
version 3.8.6 (2014-08-15).
For backwards compatibility, the "0x" hexadecimal integer
notation is only understood by the SQL language parser, not by the
type conversions routines.
String variables that
contain text formatted like hexadecimal integers are not
interpreted as hexadecimal integers when coercing the string value
into an integer due to a <a href="lang_expr.html#castexpr">CAST expression</a> or for a <a href="datatype3.html#affinity">column affinity</a>
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EXISTS operator evaluates to 1. If executing the SELECT would return
no rows at all, then the EXISTS operator evaluates to 0. 

<p>The number of columns in each row returned by the SELECT statement
(if any) and the specific values returned have no effect on the results
of the EXISTS operator. In particular, rows containing NULL values are
not handled any differently from rows without NULL values.



<h3>Scalar Subqueries</h3>

<p>A <a href="lang_select.html">SELECT</a> statement enclosed in parentheses may appear as a scalar
quantity. A <a href="lang_select.html">SELECT</a> used as a scalar quantity must return a result set
with a single column. The result of the expression is the value of the
only column in the first row returned by the SELECT statement. If the SELECT 







>
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EXISTS operator evaluates to 1. If executing the SELECT would return
no rows at all, then the EXISTS operator evaluates to 0. 

<p>The number of columns in each row returned by the SELECT statement
(if any) and the specific values returned have no effect on the results
of the EXISTS operator. In particular, rows containing NULL values are
not handled any differently from rows without NULL values.

<a name="subq"></a>

<h3>Scalar Subqueries</h3>

<p>A <a href="lang_select.html">SELECT</a> statement enclosed in parentheses may appear as a scalar
quantity. A <a href="lang_select.html">SELECT</a> used as a scalar quantity must return a result set
with a single column. The result of the expression is the value of the
only column in the first row returned by the SELECT statement. If the SELECT 
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unique integer key (the <a href="lang_createtable.html#rowid">rowid</a>) associated with every 
row of every table and so are not available on <a href="withoutrowid.html">WITHOUT ROWID</a> tables.
The special identifiers only refer to the row key if the <a href="lang_createtable.html">CREATE TABLE</a>
statement does not define a real column with the same name.
The rowid can be used anywhere a regular
column can be used.</p>





<p>A <a href="lang_select.html">SELECT</a> statement used as either a scalar subquery or as the 
right-hand operand of an IN, NOT IN or EXISTS expression may contain 
references to columns in the outer query. Such a subquery is known as
a correlated subquery. A correlated subquery is reevaluated each time
its result is required. An uncorrelated subquery is evaluated only once
and the result reused as necessary.








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unique integer key (the <a href="lang_createtable.html#rowid">rowid</a>) associated with every 
row of every table and so are not available on <a href="withoutrowid.html">WITHOUT ROWID</a> tables.
The special identifiers only refer to the row key if the <a href="lang_createtable.html">CREATE TABLE</a>
statement does not define a real column with the same name.
The rowid can be used anywhere a regular
column can be used.</p>

<a name="cosub"></a>

<h3>Correlated Subqueries</h3>

<p>A <a href="lang_select.html">SELECT</a> statement used as either a scalar subquery or as the 
right-hand operand of an IN, NOT IN or EXISTS expression may contain 
references to columns in the outer query. Such a subquery is known as
a correlated subquery. A correlated subquery is reevaluated each time
its result is required. An uncorrelated subquery is evaluated only once
and the result reused as necessary.

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      between the REAL value and zero that is closest to the REAL value.
      If a REAL is greater than the greatest possible signed
      integer (+9223372036854775807) then the result is the greatest possible
      signed integer and if the REAL is less than the least possible signed
      integer (-9223372036854775808) then the result is the least possible
      signed integer.

      <p>Prior to SQLite version 3.8.2, casting a REAL value greater than

      +9223372036854775807.0 into an integer resulted in the most negative
      integer, -9223372036854775808.  This behavior was meant to emulate the
      behavior of x86/x64 hardware when doing the equivalent cast.

<tr>
  <td> NUMERIC
  <td> Casting a TEXT or BLOB value into NUMERIC first does a forced







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      between the REAL value and zero that is closest to the REAL value.
      If a REAL is greater than the greatest possible signed
      integer (+9223372036854775807) then the result is the greatest possible
      signed integer and if the REAL is less than the least possible signed
      integer (-9223372036854775808) then the result is the least possible
      signed integer.

      <p>Prior to SQLite version 3.8.2 (2013-12-06),
      casting a REAL value greater than
      +9223372036854775807.0 into an integer resulted in the most negative
      integer, -9223372036854775808.  This behavior was meant to emulate the
      behavior of x86/x64 hardware when doing the equivalent cast.

<tr>
  <td> NUMERIC
  <td> Casting a TEXT or BLOB value into NUMERIC first does a forced
Changes to Doc/Extra/Core/lang_indexedby.html.
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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>

<li><a href='docs.html'>Documentation</a>

<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">







>

>







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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>
<li><a href='about.html'>About</a>
<li><a href='docs.html'>Documentation</a>
<li><a href='download.html'>Download</a>
<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">
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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>INDEXED BY</h2></div>
<p>The INDEXED BY phrase forces the <a href="optoverview.html">SQLite query planner</a> to use a
particular named index on a <a href="lang_delete.html">DELETE</a>, <a href="lang_select.html">SELECT</a>, or <a href="lang_update.html">UPDATE</a> statement.
The INDEXED BY phrase is an SQLite extension and
is not portable to other SQL database engines.</p>

<p><b><a href="syntax/qualified-table-name.html">qualified-table-name:</a></b>
<button id='x1435' onclick='hideorshow("x1435","x1436")'>hide</button></p>
 <div id='x1436' class='imgcontainer'>
 <img alt="syntax diagram qualified-table-name" src="images/syntax/qualified-table-name.gif" />
</div>


<p>The "INDEXED BY <span class='yyterm'>index-name</span>" phrase specifies 
that the named index
must be used in order to look up values on the preceding table.







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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>INDEXED BY</h2></div>
<p>The INDEXED BY phrase forces the <a href="optoverview.html">SQLite query planner</a> to use a
particular named index on a <a href="lang_delete.html">DELETE</a>, <a href="lang_select.html">SELECT</a>, or <a href="lang_update.html">UPDATE</a> statement.
The INDEXED BY phrase is an SQLite extension and
is not portable to other SQL database engines.</p>

<p><b><a href="syntax/qualified-table-name.html">qualified-table-name:</a></b>
<button id='x1443' onclick='hideorshow("x1443","x1444")'>hide</button></p>
 <div id='x1444' class='imgcontainer'>
 <img alt="syntax diagram qualified-table-name" src="images/syntax/qualified-table-name.gif" />
</div>


<p>The "INDEXED BY <span class='yyterm'>index-name</span>" phrase specifies 
that the named index
must be used in order to look up values on the preceding table.
Changes to Doc/Extra/Core/lang_insert.html.
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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>

<li><a href='docs.html'>Documentation</a>

<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">







>

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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>
<li><a href='about.html'>About</a>
<li><a href='docs.html'>Documentation</a>
<li><a href='download.html'>Download</a>
<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">
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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>INSERT</h2></div><p><b><a href="syntax/insert-stmt.html">insert-stmt:</a></b>
<button id='x1101' onclick='hideorshow("x1101","x1102")'>hide</button></p>
 <div id='x1102' class='imgcontainer'>
 <img alt="syntax diagram insert-stmt" src="images/syntax/insert-stmt.gif" />
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1103' onclick='hideorshow("x1103","x1104")'>show</button></p>
 <div id='x1104' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1105' onclick='hideorshow("x1105","x1106")'>show</button></p>
 <div id='x1106' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1107' onclick='hideorshow("x1107","x1108")'>show</button></p>
 <div id='x1108' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1109' onclick='hideorshow("x1109","x1110")'>show</button></p>
 <div id='x1110' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1111' onclick='hideorshow("x1111","x1112")'>show</button></p>
 <div id='x1112' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1113' onclick='hideorshow("x1113","x1114")'>show</button></p>
 <div id='x1114' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1115' onclick='hideorshow("x1115","x1116")'>show</button></p>
 <div id='x1116' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1117' onclick='hideorshow("x1117","x1118")'>show</button></p>
 <div id='x1118' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1119' onclick='hideorshow("x1119","x1120")'>show</button></p>
 <div id='x1120' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1121' onclick='hideorshow("x1121","x1122")'>show</button></p>
 <div id='x1122' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1123' onclick='hideorshow("x1123","x1124")'>show</button></p>
 <div id='x1124' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1125' onclick='hideorshow("x1125","x1126")'>show</button></p>
 <div id='x1126' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1127' onclick='hideorshow("x1127","x1128")'>show</button></p>
 <div id='x1128' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1129' onclick='hideorshow("x1129","x1130")'>show</button></p>
 <div id='x1130' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x1131' onclick='hideorshow("x1131","x1132")'>show</button></p>
 <div id='x1132' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x1133' onclick='hideorshow("x1133","x1134")'>show</button></p>
 <div id='x1134' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
</div>
</div>


<p>The INSERT statement comes in three basic forms.  







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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>INSERT</h2></div><p><b><a href="syntax/insert-stmt.html">insert-stmt:</a></b>
<button id='x1107' onclick='hideorshow("x1107","x1108")'>hide</button></p>
 <div id='x1108' class='imgcontainer'>
 <img alt="syntax diagram insert-stmt" src="images/syntax/insert-stmt.gif" />
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1109' onclick='hideorshow("x1109","x1110")'>show</button></p>
 <div id='x1110' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1111' onclick='hideorshow("x1111","x1112")'>show</button></p>
 <div id='x1112' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1113' onclick='hideorshow("x1113","x1114")'>show</button></p>
 <div id='x1114' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1115' onclick='hideorshow("x1115","x1116")'>show</button></p>
 <div id='x1116' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1117' onclick='hideorshow("x1117","x1118")'>show</button></p>
 <div id='x1118' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1119' onclick='hideorshow("x1119","x1120")'>show</button></p>
 <div id='x1120' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1121' onclick='hideorshow("x1121","x1122")'>show</button></p>
 <div id='x1122' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1123' onclick='hideorshow("x1123","x1124")'>show</button></p>
 <div id='x1124' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1125' onclick='hideorshow("x1125","x1126")'>show</button></p>
 <div id='x1126' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1127' onclick='hideorshow("x1127","x1128")'>show</button></p>
 <div id='x1128' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1129' onclick='hideorshow("x1129","x1130")'>show</button></p>
 <div id='x1130' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1131' onclick='hideorshow("x1131","x1132")'>show</button></p>
 <div id='x1132' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1133' onclick='hideorshow("x1133","x1134")'>show</button></p>
 <div id='x1134' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1135' onclick='hideorshow("x1135","x1136")'>show</button></p>
 <div id='x1136' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x1137' onclick='hideorshow("x1137","x1138")'>show</button></p>
 <div id='x1138' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x1139' onclick='hideorshow("x1139","x1140")'>show</button></p>
 <div id='x1140' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
</div>
</div>


<p>The INSERT statement comes in three basic forms.  
Changes to Doc/Extra/Core/lang_keywords.html.
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but some keywords may be omitted when SQL language features are
disabled.
Regardless of the compile-time configuration, any identifier that is not on
the following 124 element
list is not a keyword to the SQL parser in SQLite:
</p>

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but some keywords may be omitted when SQL language features are
disabled.
Regardless of the compile-time configuration, any identifier that is not on
the following 124 element
list is not a keyword to the SQL parser in SQLite:
</p>

<ol>

<li>ABORT</li>



<li>ACTION</li>
<li>ADD</li>
<li>AFTER</li>
<li>ALL</li>
<li>ALTER</li>
<li>ANALYZE</li>
<li>AND</li>
<li>AS</li>
<li>ASC</li>
<li>ATTACH</li>
<li>AUTOINCREMENT</li>
<li>BEFORE</li>
<li>BEGIN</li>
<li>BETWEEN</li>
<li>BY</li>
<li>CASCADE</li>
<li>CASE</li>
<li>CAST</li>
<li>CHECK</li>
<li>COLLATE</li>
<li>COLUMN</li>
<li>COMMIT</li>
<li>CONFLICT</li>
<li>CONSTRAINT</li>
<li>CREATE</li>
<li>CROSS</li>
<li>CURRENT_DATE</li>
<li>CURRENT_TIME</li>
<li>CURRENT_TIMESTAMP</li>
<li>DATABASE</li>
<li>DEFAULT</li>
<li>DEFERRABLE</li>
<li>DEFERRED</li>
<li>DELETE</li>
<li>DESC</li>
<li>DETACH</li>
<li>DISTINCT</li>
<li>DROP</li>
<li>EACH</li>
<li>ELSE</li>
<li>END</li>
<li>ESCAPE</li>
<li>EXCEPT</li>
<li>EXCLUSIVE</li>
<li>EXISTS</li>
<li>EXPLAIN</li>
<li>FAIL</li>
<li>FOR</li>
<li>FOREIGN</li>
<li>FROM</li>
<li>FULL</li>
<li>GLOB</li>
<li>GROUP</li>
<li>HAVING</li>
<li>IF</li>
<li>IGNORE</li>
<li>IMMEDIATE</li>
<li>IN</li>
<li>INDEX</li>
<li>INDEXED</li>
<li>INITIALLY</li>















<li>INNER</li>
<li>INSERT</li>
<li>INSTEAD</li>
<li>INTERSECT</li>
<li>INTO</li>
<li>IS</li>
<li>ISNULL</li>




<li>JOIN</li>
<li>KEY</li>
<li>LEFT</li>

<li>LIKE</li>
<li>LIMIT</li>

<li>MATCH</li>
<li>NATURAL</li>

<li>NO</li>
<li>NOT</li>




<li>NOTNULL</li>


<li>NULL</li>
<li>OF</li>
<li>OFFSET</li>
<li>ON</li>
<li>OR</li>
<li>ORDER</li>
<li>OUTER</li>
<li>PLAN</li>
<li>PRAGMA</li>
<li>PRIMARY</li>
<li>QUERY</li>

<li>RAISE</li>
<li>RECURSIVE</li>
<li>REFERENCES</li>






<li>REGEXP</li>
<li>REINDEX</li>
<li>RELEASE</li>
<li>RENAME</li>
<li>REPLACE</li>
<li>RESTRICT</li>
<li>RIGHT</li>

<li>ROLLBACK</li>
<li>ROW</li>
<li>SAVEPOINT</li>
<li>SELECT</li>
<li>SET</li>
<li>TABLE</li>

<li>TEMP</li>





<li>TEMPORARY</li>
<li>THEN</li>

<li>TO</li>
<li>TRANSACTION</li>
<li>TRIGGER</li>
<li>UNION</li>
<li>UNIQUE</li>

<li>UPDATE</li>
<li>USING</li>
<li>VACUUM</li>
<li>VALUES</li>

<li>VIEW</li>
<li>VIRTUAL</li>
<li>WHEN</li>
<li>WHERE</li>
<li>WITH</li>


<li>WITHOUT</li>
</ol>





Changes to Doc/Extra/Core/lang_naming.html.
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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>REINDEX</h2></div><p><b><a href="syntax/reindex-stmt.html">reindex-stmt:</a></b>
<button id='x1137' onclick='hideorshow("x1137","x1138")'>hide</button></p>
 <div id='x1138' class='imgcontainer'>
 <img alt="syntax diagram reindex-stmt" src="images/syntax/reindex-stmt.gif" />
</div>


<p>The REINDEX command is used to delete and recreate indices from scratch.
This is useful when the definition of a collation sequence has changed.
</p>







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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>REINDEX</h2></div><p><b><a href="syntax/reindex-stmt.html">reindex-stmt:</a></b>
<button id='x1143' onclick='hideorshow("x1143","x1144")'>hide</button></p>
 <div id='x1144' class='imgcontainer'>
 <img alt="syntax diagram reindex-stmt" src="images/syntax/reindex-stmt.gif" />
</div>


<p>The REINDEX command is used to delete and recreate indices from scratch.
This is useful when the definition of a collation sequence has changed.
</p>
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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>SAVEPOINT</h2></div><p><b><a href="syntax/savepoint-stmt.html">savepoint-stmt:</a></b>
<button id='x817' onclick='hideorshow("x817","x818")'>hide</button></p>
 <div id='x818' class='imgcontainer'>
 <img alt="syntax diagram savepoint-stmt" src="images/syntax/savepoint-stmt.gif" />
</div>
<p><b><a href="syntax/release-stmt.html">release-stmt:</a></b>
<button id='x819' onclick='hideorshow("x819","x820")'>hide</button></p>
 <div id='x820' class='imgcontainer'>
 <img alt="syntax diagram release-stmt" src="images/syntax/release-stmt.gif" />
</div>
<p><b><a href="syntax/rollback-stmt.html">rollback-stmt:</a></b>
<button id='x821' onclick='hideorshow("x821","x822")'>hide</button></p>
 <div id='x822' class='imgcontainer'>
 <img alt="syntax diagram rollback-stmt" src="images/syntax/rollback-stmt.gif" />
</div>


<p> SAVEPOINTs are a method of creating transactions, similar to
<a href="lang_transaction.html">BEGIN</a> and <a href="lang_transaction.html">COMMIT</a>, except that the SAVEPOINT and RELEASE commands
are named and may be nested.</p>







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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>SAVEPOINT</h2></div><p><b><a href="syntax/savepoint-stmt.html">savepoint-stmt:</a></b>
<button id='x821' onclick='hideorshow("x821","x822")'>hide</button></p>
 <div id='x822' class='imgcontainer'>
 <img alt="syntax diagram savepoint-stmt" src="images/syntax/savepoint-stmt.gif" />
</div>
<p><b><a href="syntax/release-stmt.html">release-stmt:</a></b>
<button id='x823' onclick='hideorshow("x823","x824")'>hide</button></p>
 <div id='x824' class='imgcontainer'>
 <img alt="syntax diagram release-stmt" src="images/syntax/release-stmt.gif" />
</div>
<p><b><a href="syntax/rollback-stmt.html">rollback-stmt:</a></b>
<button id='x825' onclick='hideorshow("x825","x826")'>hide</button></p>
 <div id='x826' class='imgcontainer'>
 <img alt="syntax diagram rollback-stmt" src="images/syntax/rollback-stmt.gif" />
</div>


<p> SAVEPOINTs are a method of creating transactions, similar to
<a href="lang_transaction.html">BEGIN</a> and <a href="lang_transaction.html">COMMIT</a>, except that the SAVEPOINT and RELEASE commands
are named and may be nested.</p>
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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>SELECT</h2></div><p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1175' onclick='hideorshow("x1175","x1176")'>hide</button></p>
 <div id='x1176' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1177' onclick='hideorshow("x1177","x1178")'>show</button></p>
 <div id='x1178' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1179' onclick='hideorshow("x1179","x1180")'>show</button></p>
 <div id='x1180' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1181' onclick='hideorshow("x1181","x1182")'>show</button></p>
 <div id='x1182' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1183' onclick='hideorshow("x1183","x1184")'>show</button></p>
 <div id='x1184' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1185' onclick='hideorshow("x1185","x1186")'>show</button></p>
 <div id='x1186' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1187' onclick='hideorshow("x1187","x1188")'>show</button></p>
 <div id='x1188' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1189' onclick='hideorshow("x1189","x1190")'>show</button></p>
 <div id='x1190' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1191' onclick='hideorshow("x1191","x1192")'>show</button></p>
 <div id='x1192' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1193' onclick='hideorshow("x1193","x1194")'>show</button></p>
 <div id='x1194' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1195' onclick='hideorshow("x1195","x1196")'>show</button></p>
 <div id='x1196' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1197' onclick='hideorshow("x1197","x1198")'>show</button></p>
 <div id='x1198' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1199' onclick='hideorshow("x1199","x1200")'>show</button></p>
 <div id='x1200' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1201' onclick='hideorshow("x1201","x1202")'>show</button></p>
 <div id='x1202' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>



<p>The SELECT statement is used to query the database.  The
result of a SELECT is zero or more rows of data where each row
has a fixed number of columns.  A SELECT statement does not make
any changes to the database.

<p>The "<a href="syntax/select-stmt.html">select-stmt</a>" syntax diagram above attempts to show as much of the
SELECT statement syntax as possible in a single diagram, because some readers
find that helpful.  The following "<a href="syntax/factored-select-stmt.html">factored-select-stmt</a>" is an alternative
syntax diagrams that expresses the same syntax but tries to break the syntax 
down into smaller chunks.

<p><b><a href="syntax/factored-select-stmt.html">factored-select-stmt:</a></b>
<button id='x1203' onclick='hideorshow("x1203","x1204")'>show</button></p>
 <div id='x1204' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram factored-select-stmt" src="images/syntax/factored-select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1205' onclick='hideorshow("x1205","x1206")'>show</button></p>
 <div id='x1206' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1207' onclick='hideorshow("x1207","x1208")'>show</button></p>
 <div id='x1208' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1209' onclick='hideorshow("x1209","x1210")'>show</button></p>
 <div id='x1210' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1211' onclick='hideorshow("x1211","x1212")'>show</button></p>
 <div id='x1212' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1213' onclick='hideorshow("x1213","x1214")'>show</button></p>
 <div id='x1214' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1215' onclick='hideorshow("x1215","x1216")'>show</button></p>
 <div id='x1216' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1217' onclick='hideorshow("x1217","x1218")'>show</button></p>
 <div id='x1218' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1219' onclick='hideorshow("x1219","x1220")'>show</button></p>
 <div id='x1220' style='display:none;' class='imgcontainer'>


















 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1221' onclick='hideorshow("x1221","x1222")'>show</button></p>
 <div id='x1222' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1223' onclick='hideorshow("x1223","x1224")'>show</button></p>
 <div id='x1224' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1225' onclick='hideorshow("x1225","x1226")'>show</button></p>
 <div id='x1226' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1227' onclick='hideorshow("x1227","x1228")'>show</button></p>
 <div id='x1228' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1229' onclick='hideorshow("x1229","x1230")'>show</button></p>
 <div id='x1230' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1231' onclick='hideorshow("x1231","x1232")'>show</button></p>
 <div id='x1232' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1233' onclick='hideorshow("x1233","x1234")'>show</button></p>
 <div id='x1234' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1235' onclick='hideorshow("x1235","x1236")'>show</button></p>
 <div id='x1236' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1237' onclick='hideorshow("x1237","x1238")'>show</button></p>
 <div id='x1238' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1239' onclick='hideorshow("x1239","x1240")'>show</button></p>
 <div id='x1240' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1241' onclick='hideorshow("x1241","x1242")'>show</button></p>
 <div id='x1242' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1243' onclick='hideorshow("x1243","x1244")'>show</button></p>
 <div id='x1244' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/select-core.html">select-core:</a></b>
<button id='x1245' onclick='hideorshow("x1245","x1246")'>show</button></p>
 <div id='x1246' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-core" src="images/syntax/select-core.gif" />
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1247' onclick='hideorshow("x1247","x1248")'>show</button></p>
 <div id='x1248' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1249' onclick='hideorshow("x1249","x1250")'>show</button></p>
 <div id='x1250' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1251' onclick='hideorshow("x1251","x1252")'>show</button></p>
 <div id='x1252' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1253' onclick='hideorshow("x1253","x1254")'>show</button></p>
 <div id='x1254' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1255' onclick='hideorshow("x1255","x1256")'>show</button></p>
 <div id='x1256' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1257' onclick='hideorshow("x1257","x1258")'>show</button></p>
 <div id='x1258' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
</div>
</div>
</div>
</div>









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b.innerHTML='hide';
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</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>SELECT</h2></div><p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1181' onclick='hideorshow("x1181","x1182")'>hide</button></p>
 <div id='x1182' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1183' onclick='hideorshow("x1183","x1184")'>show</button></p>
 <div id='x1184' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1185' onclick='hideorshow("x1185","x1186")'>show</button></p>
 <div id='x1186' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1187' onclick='hideorshow("x1187","x1188")'>show</button></p>
 <div id='x1188' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1189' onclick='hideorshow("x1189","x1190")'>show</button></p>
 <div id='x1190' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1191' onclick='hideorshow("x1191","x1192")'>show</button></p>
 <div id='x1192' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1193' onclick='hideorshow("x1193","x1194")'>show</button></p>
 <div id='x1194' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1195' onclick='hideorshow("x1195","x1196")'>show</button></p>
 <div id='x1196' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1197' onclick='hideorshow("x1197","x1198")'>show</button></p>
 <div id='x1198' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1199' onclick='hideorshow("x1199","x1200")'>show</button></p>
 <div id='x1200' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1201' onclick='hideorshow("x1201","x1202")'>show</button></p>
 <div id='x1202' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1203' onclick='hideorshow("x1203","x1204")'>show</button></p>
 <div id='x1204' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1205' onclick='hideorshow("x1205","x1206")'>show</button></p>
 <div id='x1206' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1207' onclick='hideorshow("x1207","x1208")'>show</button></p>
 <div id='x1208' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>



<p>The SELECT statement is used to query the database.  The
result of a SELECT is zero or more rows of data where each row
has a fixed number of columns.  A SELECT statement does not make
any changes to the database.

<p>The "<a href="syntax/select-stmt.html">select-stmt</a>" syntax diagram above attempts to show as much of the
SELECT statement syntax as possible in a single diagram, because some readers
find that helpful.  The following "<a href="syntax/factored-select-stmt.html">factored-select-stmt</a>" is an alternative
syntax diagrams that expresses the same syntax but tries to break the syntax 
down into smaller chunks.

<p><b><a href="syntax/factored-select-stmt.html">factored-select-stmt:</a></b>
<button id='x1209' onclick='hideorshow("x1209","x1210")'>show</button></p>
 <div id='x1210' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram factored-select-stmt" src="images/syntax/factored-select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1211' onclick='hideorshow("x1211","x1212")'>show</button></p>
 <div id='x1212' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1213' onclick='hideorshow("x1213","x1214")'>show</button></p>
 <div id='x1214' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1215' onclick='hideorshow("x1215","x1216")'>show</button></p>
 <div id='x1216' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1217' onclick='hideorshow("x1217","x1218")'>show</button></p>
 <div id='x1218' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>


















<button id='x1219' onclick='hideorshow("x1219","x1220")'>show</button></p>
 <div id='x1220' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1221' onclick='hideorshow("x1221","x1222")'>show</button></p>
 <div id='x1222' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1223' onclick='hideorshow("x1223","x1224")'>show</button></p>
 <div id='x1224' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1225' onclick='hideorshow("x1225","x1226")'>show</button></p>
 <div id='x1226' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1227' onclick='hideorshow("x1227","x1228")'>show</button></p>
 <div id='x1228' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1229' onclick='hideorshow("x1229","x1230")'>show</button></p>
 <div id='x1230' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1231' onclick='hideorshow("x1231","x1232")'>show</button></p>
 <div id='x1232' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1233' onclick='hideorshow("x1233","x1234")'>show</button></p>
 <div id='x1234' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1235' onclick='hideorshow("x1235","x1236")'>show</button></p>
 <div id='x1236' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1237' onclick='hideorshow("x1237","x1238")'>show</button></p>
 <div id='x1238' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1239' onclick='hideorshow("x1239","x1240")'>show</button></p>
 <div id='x1240' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1241' onclick='hideorshow("x1241","x1242")'>show</button></p>
 <div id='x1242' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1243' onclick='hideorshow("x1243","x1244")'>show</button></p>
 <div id='x1244' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1245' onclick='hideorshow("x1245","x1246")'>show</button></p>
 <div id='x1246' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1247' onclick='hideorshow("x1247","x1248")'>show</button></p>
 <div id='x1248' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1249' onclick='hideorshow("x1249","x1250")'>show</button></p>
 <div id='x1250' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/select-core.html">select-core:</a></b>
<button id='x1251' onclick='hideorshow("x1251","x1252")'>show</button></p>
 <div id='x1252' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-core" src="images/syntax/select-core.gif" />
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1253' onclick='hideorshow("x1253","x1254")'>show</button></p>
 <div id='x1254' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1255' onclick='hideorshow("x1255","x1256")'>show</button></p>
 <div id='x1256' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1257' onclick='hideorshow("x1257","x1258")'>show</button></p>
 <div id='x1258' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1259' onclick='hideorshow("x1259","x1260")'>show</button></p>
 <div id='x1260' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1261' onclick='hideorshow("x1261","x1262")'>show</button></p>
 <div id='x1262' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1263' onclick='hideorshow("x1263","x1264")'>show</button></p>
 <div id='x1264' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
</div>
</div>
</div>
</div>


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<h3>Simple Select Processing</h3>

<p>The core of a SELECT statement is a "simple SELECT" shown by the
<a href="syntax/select-core.html">select-core</a> and <a href="syntax/simple-select-stmt.html">simple-select-stmt</a> syntax diagrams below.  
In practice, most SELECT statements are simple SELECT statements.

<p><b><a href="syntax/simple-select-stmt.html">simple-select-stmt:</a></b>
<button id='x1259' onclick='hideorshow("x1259","x1260")'>hide</button></p>
 <div id='x1260' class='imgcontainer'>
 <img alt="syntax diagram simple-select-stmt" src="images/syntax/simple-select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1261' onclick='hideorshow("x1261","x1262")'>show</button></p>
 <div id='x1262' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1263' onclick='hideorshow("x1263","x1264")'>show</button></p>
 <div id='x1264' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1265' onclick='hideorshow("x1265","x1266")'>show</button></p>
 <div id='x1266' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1267' onclick='hideorshow("x1267","x1268")'>show</button></p>
 <div id='x1268' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1269' onclick='hideorshow("x1269","x1270")'>show</button></p>
 <div id='x1270' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1271' onclick='hideorshow("x1271","x1272")'>show</button></p>
 <div id='x1272' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1273' onclick='hideorshow("x1273","x1274")'>show</button></p>
 <div id='x1274' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1275' onclick='hideorshow("x1275","x1276")'>show</button></p>
 <div id='x1276' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1277' onclick='hideorshow("x1277","x1278")'>show</button></p>
 <div id='x1278' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1279' onclick='hideorshow("x1279","x1280")'>show</button></p>
 <div id='x1280' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1281' onclick='hideorshow("x1281","x1282")'>show</button></p>
 <div id='x1282' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1283' onclick='hideorshow("x1283","x1284")'>show</button></p>
 <div id='x1284' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1285' onclick='hideorshow("x1285","x1286")'>show</button></p>
 <div id='x1286' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1287' onclick='hideorshow("x1287","x1288")'>show</button></p>
 <div id='x1288' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1289' onclick='hideorshow("x1289","x1290")'>show</button></p>
 <div id='x1290' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1291' onclick='hideorshow("x1291","x1292")'>show</button></p>
 <div id='x1292' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1293' onclick='hideorshow("x1293","x1294")'>show</button></p>
 <div id='x1294' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1295' onclick='hideorshow("x1295","x1296")'>show</button></p>
 <div id='x1296' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1297' onclick='hideorshow("x1297","x1298")'>show</button></p>
 <div id='x1298' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1299' onclick='hideorshow("x1299","x1300")'>show</button></p>
 <div id='x1300' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1301' onclick='hideorshow("x1301","x1302")'>show</button></p>
 <div id='x1302' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/select-core.html">select-core:</a></b>
<button id='x1303' onclick='hideorshow("x1303","x1304")'>hide</button></p>
 <div id='x1304' class='imgcontainer'>
 <img alt="syntax diagram select-core" src="images/syntax/select-core.gif" />
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1305' onclick='hideorshow("x1305","x1306")'>show</button></p>
 <div id='x1306' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1307' onclick='hideorshow("x1307","x1308")'>show</button></p>
 <div id='x1308' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1309' onclick='hideorshow("x1309","x1310")'>show</button></p>
 <div id='x1310' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1311' onclick='hideorshow("x1311","x1312")'>show</button></p>
 <div id='x1312' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1313' onclick='hideorshow("x1313","x1314")'>show</button></p>
 <div id='x1314' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1315' onclick='hideorshow("x1315","x1316")'>show</button></p>
 <div id='x1316' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1317' onclick='hideorshow("x1317","x1318")'>show</button></p>
 <div id='x1318' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
</div>
</div>
</div>
</div>








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<h3>Simple Select Processing</h3>

<p>The core of a SELECT statement is a "simple SELECT" shown by the
<a href="syntax/select-core.html">select-core</a> and <a href="syntax/simple-select-stmt.html">simple-select-stmt</a> syntax diagrams below.  
In practice, most SELECT statements are simple SELECT statements.

<p><b><a href="syntax/simple-select-stmt.html">simple-select-stmt:</a></b>
<button id='x1265' onclick='hideorshow("x1265","x1266")'>hide</button></p>
 <div id='x1266' class='imgcontainer'>
 <img alt="syntax diagram simple-select-stmt" src="images/syntax/simple-select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1267' onclick='hideorshow("x1267","x1268")'>show</button></p>
 <div id='x1268' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1269' onclick='hideorshow("x1269","x1270")'>show</button></p>
 <div id='x1270' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1271' onclick='hideorshow("x1271","x1272")'>show</button></p>
 <div id='x1272' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1273' onclick='hideorshow("x1273","x1274")'>show</button></p>
 <div id='x1274' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1275' onclick='hideorshow("x1275","x1276")'>show</button></p>
 <div id='x1276' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1277' onclick='hideorshow("x1277","x1278")'>show</button></p>
 <div id='x1278' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1279' onclick='hideorshow("x1279","x1280")'>show</button></p>
 <div id='x1280' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1281' onclick='hideorshow("x1281","x1282")'>show</button></p>
 <div id='x1282' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1283' onclick='hideorshow("x1283","x1284")'>show</button></p>
 <div id='x1284' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1285' onclick='hideorshow("x1285","x1286")'>show</button></p>
 <div id='x1286' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1287' onclick='hideorshow("x1287","x1288")'>show</button></p>
 <div id='x1288' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1289' onclick='hideorshow("x1289","x1290")'>show</button></p>
 <div id='x1290' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1291' onclick='hideorshow("x1291","x1292")'>show</button></p>
 <div id='x1292' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1293' onclick='hideorshow("x1293","x1294")'>show</button></p>
 <div id='x1294' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1295' onclick='hideorshow("x1295","x1296")'>show</button></p>
 <div id='x1296' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1297' onclick='hideorshow("x1297","x1298")'>show</button></p>
 <div id='x1298' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1299' onclick='hideorshow("x1299","x1300")'>show</button></p>
 <div id='x1300' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1301' onclick='hideorshow("x1301","x1302")'>show</button></p>
 <div id='x1302' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1303' onclick='hideorshow("x1303","x1304")'>show</button></p>
 <div id='x1304' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1305' onclick='hideorshow("x1305","x1306")'>show</button></p>
 <div id='x1306' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1307' onclick='hideorshow("x1307","x1308")'>show</button></p>
 <div id='x1308' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/select-core.html">select-core:</a></b>
<button id='x1309' onclick='hideorshow("x1309","x1310")'>hide</button></p>
 <div id='x1310' class='imgcontainer'>
 <img alt="syntax diagram select-core" src="images/syntax/select-core.gif" />
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1311' onclick='hideorshow("x1311","x1312")'>show</button></p>
 <div id='x1312' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1313' onclick='hideorshow("x1313","x1314")'>show</button></p>
 <div id='x1314' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1315' onclick='hideorshow("x1315","x1316")'>show</button></p>
 <div id='x1316' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1317' onclick='hideorshow("x1317","x1318")'>show</button></p>
 <div id='x1318' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1319' onclick='hideorshow("x1319","x1320")'>show</button></p>
 <div id='x1320' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1321' onclick='hideorshow("x1321","x1322")'>show</button></p>
 <div id='x1322' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1323' onclick='hideorshow("x1323","x1324")'>show</button></p>
 <div id='x1324' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
</div>
</div>
</div>
</div>

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<h3>Compound Select Statements</h3>

<p>Two or more <a href="lang_select.html#simpleselect">simple SELECT</a> statements may be connected together to form
a compound SELECT using the UNION, UNION ALL, INTERSECT or EXCEPT operator,
as shown by the following diagram:

<p><b><a href="syntax/compound-select-stmt.html">compound-select-stmt:</a></b>
<button id='x1319' onclick='hideorshow("x1319","x1320")'>hide</button></p>
 <div id='x1320' class='imgcontainer'>
 <img alt="syntax diagram compound-select-stmt" src="images/syntax/compound-select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1321' onclick='hideorshow("x1321","x1322")'>show</button></p>
 <div id='x1322' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1323' onclick='hideorshow("x1323","x1324")'>show</button></p>
 <div id='x1324' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1325' onclick='hideorshow("x1325","x1326")'>show</button></p>
 <div id='x1326' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1327' onclick='hideorshow("x1327","x1328")'>show</button></p>
 <div id='x1328' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1329' onclick='hideorshow("x1329","x1330")'>show</button></p>
 <div id='x1330' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1331' onclick='hideorshow("x1331","x1332")'>show</button></p>
 <div id='x1332' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1333' onclick='hideorshow("x1333","x1334")'>show</button></p>
 <div id='x1334' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1335' onclick='hideorshow("x1335","x1336")'>show</button></p>
 <div id='x1336' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1337' onclick='hideorshow("x1337","x1338")'>show</button></p>
 <div id='x1338' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1339' onclick='hideorshow("x1339","x1340")'>show</button></p>
 <div id='x1340' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1341' onclick='hideorshow("x1341","x1342")'>show</button></p>
 <div id='x1342' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1343' onclick='hideorshow("x1343","x1344")'>show</button></p>
 <div id='x1344' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1345' onclick='hideorshow("x1345","x1346")'>show</button></p>
 <div id='x1346' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1347' onclick='hideorshow("x1347","x1348")'>show</button></p>
 <div id='x1348' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1349' onclick='hideorshow("x1349","x1350")'>show</button></p>
 <div id='x1350' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1351' onclick='hideorshow("x1351","x1352")'>show</button></p>
 <div id='x1352' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1353' onclick='hideorshow("x1353","x1354")'>show</button></p>
 <div id='x1354' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1355' onclick='hideorshow("x1355","x1356")'>show</button></p>
 <div id='x1356' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1357' onclick='hideorshow("x1357","x1358")'>show</button></p>
 <div id='x1358' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1359' onclick='hideorshow("x1359","x1360")'>show</button></p>
 <div id='x1360' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1361' onclick='hideorshow("x1361","x1362")'>show</button></p>
 <div id='x1362' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/select-core.html">select-core:</a></b>
<button id='x1363' onclick='hideorshow("x1363","x1364")'>show</button></p>
 <div id='x1364' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-core" src="images/syntax/select-core.gif" />
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1365' onclick='hideorshow("x1365","x1366")'>show</button></p>
 <div id='x1366' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1367' onclick='hideorshow("x1367","x1368")'>show</button></p>
 <div id='x1368' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1369' onclick='hideorshow("x1369","x1370")'>show</button></p>
 <div id='x1370' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1371' onclick='hideorshow("x1371","x1372")'>show</button></p>
 <div id='x1372' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1373' onclick='hideorshow("x1373","x1374")'>show</button></p>
 <div id='x1374' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1375' onclick='hideorshow("x1375","x1376")'>show</button></p>
 <div id='x1376' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1377' onclick='hideorshow("x1377","x1378")'>show</button></p>
 <div id='x1378' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
</div>
</div>
</div>
</div>








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<h3>Compound Select Statements</h3>

<p>Two or more <a href="lang_select.html#simpleselect">simple SELECT</a> statements may be connected together to form
a compound SELECT using the UNION, UNION ALL, INTERSECT or EXCEPT operator,
as shown by the following diagram:

<p><b><a href="syntax/compound-select-stmt.html">compound-select-stmt:</a></b>
<button id='x1325' onclick='hideorshow("x1325","x1326")'>hide</button></p>
 <div id='x1326' class='imgcontainer'>
 <img alt="syntax diagram compound-select-stmt" src="images/syntax/compound-select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1327' onclick='hideorshow("x1327","x1328")'>show</button></p>
 <div id='x1328' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1329' onclick='hideorshow("x1329","x1330")'>show</button></p>
 <div id='x1330' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1331' onclick='hideorshow("x1331","x1332")'>show</button></p>
 <div id='x1332' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1333' onclick='hideorshow("x1333","x1334")'>show</button></p>
 <div id='x1334' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1335' onclick='hideorshow("x1335","x1336")'>show</button></p>
 <div id='x1336' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1337' onclick='hideorshow("x1337","x1338")'>show</button></p>
 <div id='x1338' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1339' onclick='hideorshow("x1339","x1340")'>show</button></p>
 <div id='x1340' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1341' onclick='hideorshow("x1341","x1342")'>show</button></p>
 <div id='x1342' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1343' onclick='hideorshow("x1343","x1344")'>show</button></p>
 <div id='x1344' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1345' onclick='hideorshow("x1345","x1346")'>show</button></p>
 <div id='x1346' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1347' onclick='hideorshow("x1347","x1348")'>show</button></p>
 <div id='x1348' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1349' onclick='hideorshow("x1349","x1350")'>show</button></p>
 <div id='x1350' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1351' onclick='hideorshow("x1351","x1352")'>show</button></p>
 <div id='x1352' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1353' onclick='hideorshow("x1353","x1354")'>show</button></p>
 <div id='x1354' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1355' onclick='hideorshow("x1355","x1356")'>show</button></p>
 <div id='x1356' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1357' onclick='hideorshow("x1357","x1358")'>show</button></p>
 <div id='x1358' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1359' onclick='hideorshow("x1359","x1360")'>show</button></p>
 <div id='x1360' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1361' onclick='hideorshow("x1361","x1362")'>show</button></p>
 <div id='x1362' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1363' onclick='hideorshow("x1363","x1364")'>show</button></p>
 <div id='x1364' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1365' onclick='hideorshow("x1365","x1366")'>show</button></p>
 <div id='x1366' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1367' onclick='hideorshow("x1367","x1368")'>show</button></p>
 <div id='x1368' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/select-core.html">select-core:</a></b>
<button id='x1369' onclick='hideorshow("x1369","x1370")'>show</button></p>
 <div id='x1370' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-core" src="images/syntax/select-core.gif" />
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1371' onclick='hideorshow("x1371","x1372")'>show</button></p>
 <div id='x1372' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1373' onclick='hideorshow("x1373","x1374")'>show</button></p>
 <div id='x1374' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1375' onclick='hideorshow("x1375","x1376")'>show</button></p>
 <div id='x1376' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1377' onclick='hideorshow("x1377","x1378")'>show</button></p>
 <div id='x1378' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1379' onclick='hideorshow("x1379","x1380")'>show</button></p>
 <div id='x1380' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1381' onclick='hideorshow("x1381","x1382")'>show</button></p>
 <div id='x1382' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1383' onclick='hideorshow("x1383","x1384")'>show</button></p>
 <div id='x1384' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
</div>
</div>
</div>
</div>

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<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>BEGIN TRANSACTION</h2></div><p><b><a href="syntax/begin-stmt.html">begin-stmt:</a></b>
<button id='x811' onclick='hideorshow("x811","x812")'>hide</button></p>
 <div id='x812' class='imgcontainer'>
 <img alt="syntax diagram begin-stmt" src="images/syntax/begin-stmt.gif" />
</div>
<p><b><a href="syntax/commit-stmt.html">commit-stmt:</a></b>
<button id='x813' onclick='hideorshow("x813","x814")'>hide</button></p>
 <div id='x814' class='imgcontainer'>
 <img alt="syntax diagram commit-stmt" src="images/syntax/commit-stmt.gif" />
</div>
<p><b><a href="syntax/rollback-stmt.html">rollback-stmt:</a></b>
<button id='x815' onclick='hideorshow("x815","x816")'>hide</button></p>
 <div id='x816' class='imgcontainer'>
 <img alt="syntax diagram rollback-stmt" src="images/syntax/rollback-stmt.gif" />
</div>


<p>
No changes can be made to the database except within a transaction.
Any command that changes the database (basically, any SQL command







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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>BEGIN TRANSACTION</h2></div><p><b><a href="syntax/begin-stmt.html">begin-stmt:</a></b>
<button id='x815' onclick='hideorshow("x815","x816")'>hide</button></p>
 <div id='x816' class='imgcontainer'>
 <img alt="syntax diagram begin-stmt" src="images/syntax/begin-stmt.gif" />
</div>
<p><b><a href="syntax/commit-stmt.html">commit-stmt:</a></b>
<button id='x817' onclick='hideorshow("x817","x818")'>hide</button></p>
 <div id='x818' class='imgcontainer'>
 <img alt="syntax diagram commit-stmt" src="images/syntax/commit-stmt.gif" />
</div>
<p><b><a href="syntax/rollback-stmt.html">rollback-stmt:</a></b>
<button id='x819' onclick='hideorshow("x819","x820")'>hide</button></p>
 <div id='x820' class='imgcontainer'>
 <img alt="syntax diagram rollback-stmt" src="images/syntax/rollback-stmt.gif" />
</div>


<p>
No changes can be made to the database except within a transaction.
Any command that changes the database (basically, any SQL command
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if an another thread or process has a <a href="lockingv3.html#shared_lock">shared lock</a> on the database
that prevented the database from being updated.  When COMMIT fails in this
way, the transaction remains active and the COMMIT can be retried later
after the reader has had a chance to clear.
</p>

<p>
In very old versions of SQLite (before version 3.7.11 circa 2012-03-20)
the ROLLBACK will fail with an error code 
<a href="rescode.html#busy">SQLITE_BUSY</a> if there are any pending queries.  In more recent
versions of SQLite, the ROLLBACK will proceed and pending statements
will often be aborted, causing them to return an <a href="rescode.html#abort">SQLITE_ABORT</a> or
<a href="rescode.html#abort_rollback">SQLITE_ABORT_ROLLBACK</a> error.

In SQLite version 3.8.8 and later, a pending read will continue functioning
after the ROLLBACK as long as the ROLLBACK does not modify the database
schema.
</p>

<p>
If <a href="pragma.html#pragma_journal_mode">PRAGMA journal_mode</a> is set to OFF (thus disabling the rollback journal
file) then the behavior of the ROLLBACK command is undefined.







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if an another thread or process has a <a href="lockingv3.html#shared_lock">shared lock</a> on the database
that prevented the database from being updated.  When COMMIT fails in this
way, the transaction remains active and the COMMIT can be retried later
after the reader has had a chance to clear.
</p>

<p>
In very old versions of SQLite (before version 3.7.11 - 2012-03-20)
the ROLLBACK will fail with an error code 
<a href="rescode.html#busy">SQLITE_BUSY</a> if there are any pending queries.  In more recent
versions of SQLite, the ROLLBACK will proceed and pending statements
will often be aborted, causing them to return an <a href="rescode.html#abort">SQLITE_ABORT</a> or
<a href="rescode.html#abort_rollback">SQLITE_ABORT_ROLLBACK</a> error.
In SQLite version 3.8.8 (2015-01-16) and later,
a pending read will continue functioning
after the ROLLBACK as long as the ROLLBACK does not modify the database
schema.
</p>

<p>
If <a href="pragma.html#pragma_journal_mode">PRAGMA journal_mode</a> is set to OFF (thus disabling the rollback journal
file) then the behavior of the ROLLBACK command is undefined.
Changes to Doc/Extra/Core/lang_update.html.
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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>UPDATE</h2></div><p><b><a href="syntax/update-stmt.html">update-stmt:</a></b>
<button id='x1379' onclick='hideorshow("x1379","x1380")'>hide</button></p>
 <div id='x1380' class='imgcontainer'>
 <img alt="syntax diagram update-stmt" src="images/syntax/update-stmt.gif" />





<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1381' onclick='hideorshow("x1381","x1382")'>show</button></p>
 <div id='x1382' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1383' onclick='hideorshow("x1383","x1384")'>show</button></p>
 <div id='x1384' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1385' onclick='hideorshow("x1385","x1386")'>show</button></p>
 <div id='x1386' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1387' onclick='hideorshow("x1387","x1388")'>show</button></p>
 <div id='x1388' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1389' onclick='hideorshow("x1389","x1390")'>show</button></p>
 <div id='x1390' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1391' onclick='hideorshow("x1391","x1392")'>show</button></p>
 <div id='x1392' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1393' onclick='hideorshow("x1393","x1394")'>show</button></p>
 <div id='x1394' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1395' onclick='hideorshow("x1395","x1396")'>show</button></p>
 <div id='x1396' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1397' onclick='hideorshow("x1397","x1398")'>show</button></p>
 <div id='x1398' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1399' onclick='hideorshow("x1399","x1400")'>show</button></p>
 <div id='x1400' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1401' onclick='hideorshow("x1401","x1402")'>show</button></p>
 <div id='x1402' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1403' onclick='hideorshow("x1403","x1404")'>show</button></p>
 <div id='x1404' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1405' onclick='hideorshow("x1405","x1406")'>show</button></p>
 <div id='x1406' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1407' onclick='hideorshow("x1407","x1408")'>show</button></p>
 <div id='x1408' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/qualified-table-name.html">qualified-table-name:</a></b>
<button id='x1409' onclick='hideorshow("x1409","x1410")'>show</button></p>
 <div id='x1410' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram qualified-table-name" src="images/syntax/qualified-table-name.gif" />
</div>
<p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x1411' onclick='hideorshow("x1411","x1412")'>show</button></p>
 <div id='x1412' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x1413' onclick='hideorshow("x1413","x1414")'>show</button></p>
 <div id='x1414' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1415' onclick='hideorshow("x1415","x1416")'>show</button></p>
 <div id='x1416' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1417' onclick='hideorshow("x1417","x1418")'>show</button></p>
 <div id='x1418' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1419' onclick='hideorshow("x1419","x1420")'>show</button></p>
 <div id='x1420' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1421' onclick='hideorshow("x1421","x1422")'>show</button></p>
 <div id='x1422' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1423' onclick='hideorshow("x1423","x1424")'>show</button></p>
 <div id='x1424' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1425' onclick='hideorshow("x1425","x1426")'>show</button></p>
 <div id='x1426' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1427' onclick='hideorshow("x1427","x1428")'>show</button></p>
 <div id='x1428' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1429' onclick='hideorshow("x1429","x1430")'>show</button></p>
 <div id='x1430' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1431' onclick='hideorshow("x1431","x1432")'>show</button></p>
 <div id='x1432' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>
</div>









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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>UPDATE</h2></div><p><b><a href="syntax/update-stmt.html">update-stmt:</a></b>
<button id='x1385' onclick='hideorshow("x1385","x1386")'>hide</button></p>
 <div id='x1386' class='imgcontainer'>
 <img alt="syntax diagram update-stmt" src="images/syntax/update-stmt.gif" />
<p><b><a href="syntax/column-name-list.html">column-name-list:</a></b>
<button id='x1387' onclick='hideorshow("x1387","x1388")'>show</button></p>
 <div id='x1388' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram column-name-list" src="images/syntax/column-name-list.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1389' onclick='hideorshow("x1389","x1390")'>show</button></p>
 <div id='x1390' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1391' onclick='hideorshow("x1391","x1392")'>show</button></p>
 <div id='x1392' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1393' onclick='hideorshow("x1393","x1394")'>show</button></p>
 <div id='x1394' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1395' onclick='hideorshow("x1395","x1396")'>show</button></p>
 <div id='x1396' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1397' onclick='hideorshow("x1397","x1398")'>show</button></p>
 <div id='x1398' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1399' onclick='hideorshow("x1399","x1400")'>show</button></p>
 <div id='x1400' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1401' onclick='hideorshow("x1401","x1402")'>show</button></p>
 <div id='x1402' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1403' onclick='hideorshow("x1403","x1404")'>show</button></p>
 <div id='x1404' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1405' onclick='hideorshow("x1405","x1406")'>show</button></p>
 <div id='x1406' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1407' onclick='hideorshow("x1407","x1408")'>show</button></p>
 <div id='x1408' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1409' onclick='hideorshow("x1409","x1410")'>show</button></p>
 <div id='x1410' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1411' onclick='hideorshow("x1411","x1412")'>show</button></p>
 <div id='x1412' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1413' onclick='hideorshow("x1413","x1414")'>show</button></p>
 <div id='x1414' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1415' onclick='hideorshow("x1415","x1416")'>show</button></p>
 <div id='x1416' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/qualified-table-name.html">qualified-table-name:</a></b>
<button id='x1417' onclick='hideorshow("x1417","x1418")'>show</button></p>
 <div id='x1418' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram qualified-table-name" src="images/syntax/qualified-table-name.gif" />
</div>
<p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x1419' onclick='hideorshow("x1419","x1420")'>show</button></p>
 <div id='x1420' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x1421' onclick='hideorshow("x1421","x1422")'>show</button></p>
 <div id='x1422' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1423' onclick='hideorshow("x1423","x1424")'>show</button></p>
 <div id='x1424' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1425' onclick='hideorshow("x1425","x1426")'>show</button></p>
 <div id='x1426' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1427' onclick='hideorshow("x1427","x1428")'>show</button></p>
 <div id='x1428' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1429' onclick='hideorshow("x1429","x1430")'>show</button></p>
 <div id='x1430' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1431' onclick='hideorshow("x1431","x1432")'>show</button></p>
 <div id='x1432' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1433' onclick='hideorshow("x1433","x1434")'>show</button></p>
 <div id='x1434' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1435' onclick='hideorshow("x1435","x1436")'>show</button></p>
 <div id='x1436' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1437' onclick='hideorshow("x1437","x1438")'>show</button></p>
 <div id='x1438' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1439' onclick='hideorshow("x1439","x1440")'>show</button></p>
 <div id='x1440' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>
</div>


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<a href="lang_expr.html#booleanexpr">boolean expression is true</a>. It is not an error if the
WHERE clause does not evaluate to true for any row in the table - this just
means that the UPDATE statement affects zero rows.

<p>The modifications made to each row affected by an UPDATE statement are
determined by the list of assignments following the SET keyword. Each
assignment specifies a <span class='yyterm'>column-name</span> to the left of the 
equals sign and a
scalar expression to the right. For each affected row, the named columns
are set to the values found by evaluating the corresponding scalar 
expressions. If a single column-name appears more than once in the list of
assignment expressions, all but the rightmost occurrence is ignored. Columns
that do not appear in the list of assignments are left unmodified. The scalar
expressions may refer to columns of the row being updated. In this case all
scalar expressions are evaluated before any assignments are made.







<p>The optional "OR <i>action</i>" conflict clause that follows the
UPDATE keyword allows the user to nominate a specific
constraint conflict resolution algorithm to use during this one UPDATE command.
Refer to the section entitled <a href="lang_conflict.html">ON CONFLICT</a> for additional information.

<h3>Restrictions on UPDATE Statements Within CREATE TRIGGER</h3>







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<a href="lang_expr.html#booleanexpr">boolean expression is true</a>. It is not an error if the
WHERE clause does not evaluate to true for any row in the table - this just
means that the UPDATE statement affects zero rows.

<p>The modifications made to each row affected by an UPDATE statement are
determined by the list of assignments following the SET keyword. Each
assignment specifies a <span class='yyterm'>column-name</span> to the left of the 
equals sign and a scalar expression to the right. 
For each affected row, the named columns
are set to the values found by evaluating the corresponding scalar 
expressions. If a single column-name appears more than once in the list of
assignment expressions, all but the rightmost occurrence is ignored. Columns
that do not appear in the list of assignments are left unmodified. The scalar
expressions may refer to columns of the row being updated. In this case all
scalar expressions are evaluated before any assignments are made.

<p>Beginning in SQLite <a href="releaselog/3_15_0.html">version 3.15.0</a> (2016-10-14), an assignment in
the SET clause can be a 
<a href="syntax/column-name-list.html">parenthesized list of column names</a> on the left and a
<a href="rowvalue.html">row value</a> of the same size on the right.


<p>The optional "OR <i>action</i>" conflict clause that follows the
UPDATE keyword allows the user to nominate a specific
constraint conflict resolution algorithm to use during this one UPDATE command.
Refer to the section entitled <a href="lang_conflict.html">ON CONFLICT</a> for additional information.

<h3>Restrictions on UPDATE Statements Within CREATE TRIGGER</h3>
Changes to Doc/Extra/Core/lang_vacuum.html.
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<ul>

<li><a href='docs.html'>Documentation</a>

<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
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<li><a href='about.html'>About</a>
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<li><a href='download.html'>Download</a>
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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>VACUUM</h2></div><p><b><a href="syntax/vacuum-stmt.html">vacuum-stmt:</a></b>
<button id='x1433' onclick='hideorshow("x1433","x1434")'>hide</button></p>
 <div id='x1434' class='imgcontainer'>
 <img alt="syntax diagram vacuum-stmt" src="images/syntax/vacuum-stmt.gif" />
</div>


<p>
  The VACUUM command rebuilds the entire database. There are several 

  reasons an application might do this:

<ul>
  <li> <p> Unless SQLite is running in "auto_vacuum=FULL" mode, when a large
     amount of data is deleted from the database file it leaves behind empty
     space, or "free" database pages. This means the database file might
     be larger than strictly necessary. Running VACUUM to rebuild the 







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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>VACUUM</h2></div><p><b><a href="syntax/vacuum-stmt.html">vacuum-stmt:</a></b>
<button id='x1441' onclick='hideorshow("x1441","x1442")'>hide</button></p>
 <div id='x1442' class='imgcontainer'>
 <img alt="syntax diagram vacuum-stmt" src="images/syntax/vacuum-stmt.gif" />
</div>


<p>
  The VACUUM command rebuilds the database file, repacking it into a minimal
  amount of disk space. There are several 
  reasons an application might do this:

<ul>
  <li> <p> Unless SQLite is running in "auto_vacuum=FULL" mode, when a large
     amount of data is deleted from the database file it leaves behind empty
     space, or "free" database pages. This means the database file might
     be larger than strictly necessary. Running VACUUM to rebuild the 
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     <a href="pragma.html#pragma_page_size">page_size</a> and/or <a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a> properties of an existing database may be
     changed by using the <a href="pragma.html#pragma_page_size">page_size</a>  and/or 
     <a href="pragma.html#pragma_auto_vacuum">pragma auto_vacuum</a> pragmas and then immediately VACUUMing
     the database. When in <a href="wal.html">write-ahead log</a> mode, only the <a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a>
     support property can be changed using VACUUM.
</ul>

<p>VACUUM only works on the main database. It is not possible to VACUUM an


attached database file.






<p>The VACUUM command works by copying the contents of the database into
a temporary database file and then overwriting the original with the 
contents of the temporary file. When overwriting the original, a rollback
journal or <a href="wal.html">write-ahead log</a> WAL file is used just as it would be for any
other database transaction. This means that when VACUUMing a database, 
as much as twice the size of the original database file is required in free
disk space.

<p>The VACUUM command may change the <a href="lang_createtable.html#rowid">ROWIDs</a> of entries in any
tables that do not have an explicit <a href="lang_createtable.html#rowid">INTEGER PRIMARY KEY</a>.
</p>

<p>A VACUUM will fail if there is an open transaction, or if there are one or
more active SQL statements when it is run.

<p>As of SQLite version 3.1, an alternative to using the VACUUM command to
reclaim space after data has been deleted is auto-vacuum mode, enabled using
the <a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a> pragma. When <a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a> is enabled for a database
free pages may be reclaimed after deleting data, causing the file to shrink,
without rebuilding the entire database using VACUUM.  However, using
<a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a> can lead to extra database file fragmentation.  And <a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a>
does not compact partially filled pages of the database as VACUUM does.

</p>










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     <a href="pragma.html#pragma_page_size">page_size</a> and/or <a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a> properties of an existing database may be
     changed by using the <a href="pragma.html#pragma_page_size">page_size</a>  and/or 
     <a href="pragma.html#pragma_auto_vacuum">pragma auto_vacuum</a> pragmas and then immediately VACUUMing
     the database. When in <a href="wal.html">write-ahead log</a> mode, only the <a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a>
     support property can be changed using VACUUM.
</ul>

<p>By default, VACUUM only works only on the main database.
<a href="lang_attach.html">Attached databases</a> can be vacuumed by appending the appropriate
<span class='yyterm'>schema-name</span> to the VACUUM statement.

<p><b>Compatibility Warning:</b> The ability to vacuum attached databases was
added in <a href="releaselog/3_15_0.html">version 3.15.0</a> (2016-10-14).  Prior to that, a 
<span class='yyterm'>schema-name</span> added to the
VACUUM statement would be silently ignored and the "main" schema would be
vacuumed.</p>

<p>The VACUUM command works by copying the contents of the database into
a temporary database file and then overwriting the original with the 
contents of the temporary file. When overwriting the original, a rollback
journal or <a href="wal.html">write-ahead log</a> WAL file is used just as it would be for any
other database transaction. This means that when VACUUMing a database, 
as much as twice the size of the original database file is required in free
disk space.

<p>The VACUUM command may change the <a href="lang_createtable.html#rowid">ROWIDs</a> of entries in any
tables that do not have an explicit <a href="lang_createtable.html#rowid">INTEGER PRIMARY KEY</a>.
</p>

<p>A VACUUM will fail if there is an open transaction, or if there are one or
more active SQL statements when it is run.

<p>An alternative to using the VACUUM command to
reclaim space after data has been deleted is auto-vacuum mode, enabled using
the <a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a> pragma. When <a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a> is enabled for a database
free pages may be reclaimed after deleting data, causing the file to shrink,
without rebuilding the entire database using VACUUM.  However, using
<a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a> can lead to extra database file fragmentation.  And <a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a>
does not compact partially filled pages of the database as VACUUM does.

</p>



Changes to Doc/Extra/Core/lang_with.html.
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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>

<li><a href='docs.html'>Documentation</a>

<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
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<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">







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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>
<li><a href='about.html'>About</a>
<li><a href='docs.html'>Documentation</a>
<li><a href='download.html'>Download</a>
<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
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<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">
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}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>WITH clause</h2></div><p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x1139' onclick='hideorshow("x1139","x1140")'>hide</button></p>
 <div id='x1140' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x1141' onclick='hideorshow("x1141","x1142")'>show</button></p>
 <div id='x1142' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1143' onclick='hideorshow("x1143","x1144")'>show</button></p>
 <div id='x1144' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1145' onclick='hideorshow("x1145","x1146")'>show</button></p>
 <div id='x1146' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1147' onclick='hideorshow("x1147","x1148")'>show</button></p>
 <div id='x1148' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1149' onclick='hideorshow("x1149","x1150")'>show</button></p>
 <div id='x1150' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1151' onclick='hideorshow("x1151","x1152")'>show</button></p>
 <div id='x1152' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1153' onclick='hideorshow("x1153","x1154")'>show</button></p>
 <div id='x1154' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1155' onclick='hideorshow("x1155","x1156")'>show</button></p>
 <div id='x1156' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1157' onclick='hideorshow("x1157","x1158")'>show</button></p>
 <div id='x1158' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1159' onclick='hideorshow("x1159","x1160")'>show</button></p>
 <div id='x1160' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1161' onclick='hideorshow("x1161","x1162")'>show</button></p>
 <div id='x1162' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1163' onclick='hideorshow("x1163","x1164")'>show</button></p>
 <div id='x1164' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1165' onclick='hideorshow("x1165","x1166")'>show</button></p>
 <div id='x1166' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1167' onclick='hideorshow("x1167","x1168")'>show</button></p>
 <div id='x1168' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1169' onclick='hideorshow("x1169","x1170")'>show</button></p>
 <div id='x1170' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>


<p>Common Table Expressions or CTEs act like temporary <a href="lang_createview.html">views</a> that exist







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b.innerHTML='hide';
}
return false;
}
</script>
</div>
<div class=nosearch><h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>WITH clause</h2></div><p><b><a href="syntax/with-clause.html">with-clause:</a></b>
<button id='x1145' onclick='hideorshow("x1145","x1146")'>hide</button></p>
 <div id='x1146' class='imgcontainer'>
 <img alt="syntax diagram with-clause" src="images/syntax/with-clause.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x1147' onclick='hideorshow("x1147","x1148")'>show</button></p>
 <div id='x1148' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
<button id='x1149' onclick='hideorshow("x1149","x1150")'>show</button></p>
 <div id='x1150' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
<button id='x1151' onclick='hideorshow("x1151","x1152")'>show</button></p>
 <div id='x1152' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
</div>
<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
<button id='x1153' onclick='hideorshow("x1153","x1154")'>show</button></p>
 <div id='x1154' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
</div>
<p><b><a href="syntax/expr.html">expr:</a></b>
<button id='x1155' onclick='hideorshow("x1155","x1156")'>show</button></p>
 <div id='x1156' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram expr" src="images/syntax/expr.gif" />
<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
<button id='x1157' onclick='hideorshow("x1157","x1158")'>show</button></p>
 <div id='x1158' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
</div>
<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
<button id='x1159' onclick='hideorshow("x1159","x1160")'>show</button></p>
 <div id='x1160' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
</div>
<p><b><a href="syntax/type-name.html">type-name:</a></b>
<button id='x1161' onclick='hideorshow("x1161","x1162")'>show</button></p>
 <div id='x1162' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1163' onclick='hideorshow("x1163","x1164")'>show</button></p>
 <div id='x1164' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>
<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
<button id='x1165' onclick='hideorshow("x1165","x1166")'>show</button></p>
 <div id='x1166' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
<button id='x1167' onclick='hideorshow("x1167","x1168")'>show</button></p>
 <div id='x1168' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
</div>
<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
<button id='x1169' onclick='hideorshow("x1169","x1170")'>show</button></p>
 <div id='x1170' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
</div>
</div>
<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
<button id='x1171' onclick='hideorshow("x1171","x1172")'>show</button></p>
 <div id='x1172' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
</div>
<p><b><a href="syntax/result-column.html">result-column:</a></b>
<button id='x1173' onclick='hideorshow("x1173","x1174")'>show</button></p>
 <div id='x1174' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
</div>
<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
<button id='x1175' onclick='hideorshow("x1175","x1176")'>show</button></p>
 <div id='x1176' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
</div>
</div>
</div>


<p>Common Table Expressions or CTEs act like temporary <a href="lang_createview.html">views</a> that exist
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     of the compound select, and nowhere else.
</ol>

<p>To put it another way, a recursive common table expression must
look like the following:

<p><b><a href="syntax/recursive-cte.html">recursive-cte:</a></b>
<button id='x1171' onclick='hideorshow("x1171","x1172")'>hide</button></p>
 <div id='x1172' class='imgcontainer'>
 <img alt="syntax diagram recursive-cte" src="images/syntax/recursive-cte.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x1173' onclick='hideorshow("x1173","x1174")'>show</button></p>
 <div id='x1174' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
</div>


<p>Call the table named by the <a href="syntax/cte-table-name.html">cte-table-name</a> in a recursive
common table expression the "recursive table".







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     of the compound select, and nowhere else.
</ol>

<p>To put it another way, a recursive common table expression must
look like the following:

<p><b><a href="syntax/recursive-cte.html">recursive-cte:</a></b>
<button id='x1177' onclick='hideorshow("x1177","x1178")'>hide</button></p>
 <div id='x1178' class='imgcontainer'>
 <img alt="syntax diagram recursive-cte" src="images/syntax/recursive-cte.gif" />
<p><b><a href="syntax/cte-table-name.html">cte-table-name:</a></b>
<button id='x1179' onclick='hideorshow("x1179","x1180")'>show</button></p>
 <div id='x1180' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram cte-table-name" src="images/syntax/cte-table-name.gif" />
</div>
</div>


<p>Call the table named by the <a href="syntax/cte-table-name.html">cte-table-name</a> in a recursive
common table expression the "recursive table".
Changes to Doc/Extra/Core/pragma.html.
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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>

<li><a href='docs.html'>Documentation</a>

<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">







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>







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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>
<li><a href='about.html'>About</a>
<li><a href='docs.html'>Documentation</a>
<li><a href='download.html'>Download</a>
<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">
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opportunity to add new PRAGMA statements or to override the meaning of
built-in PRAGMA statements.</p>


<hr /><a name="syntax"></a>
<h2>PRAGMA command syntax</h2>
<p><b><a href="syntax/pragma-stmt.html">pragma-stmt:</a></b>
<button id='x1469' onclick='hideorshow("x1469","x1470")'>hide</button></p>
 <div id='x1470' class='imgcontainer'>
 <img alt="syntax diagram pragma-stmt" src="images/syntax/pragma-stmt.gif" />
<p><b><a href="syntax/pragma-value.html">pragma-value:</a></b>
<button id='x1471' onclick='hideorshow("x1471","x1472")'>hide</button></p>
 <div id='x1472' class='imgcontainer'>
 <img alt="syntax diagram pragma-value" src="images/syntax/pragma-value.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1473' onclick='hideorshow("x1473","x1474")'>show</button></p>
 <div id='x1474' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>


<p>







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opportunity to add new PRAGMA statements or to override the meaning of
built-in PRAGMA statements.</p>


<hr /><a name="syntax"></a>
<h2>PRAGMA command syntax</h2>
<p><b><a href="syntax/pragma-stmt.html">pragma-stmt:</a></b>
<button id='x1477' onclick='hideorshow("x1477","x1478")'>hide</button></p>
 <div id='x1478' class='imgcontainer'>
 <img alt="syntax diagram pragma-stmt" src="images/syntax/pragma-stmt.gif" />
<p><b><a href="syntax/pragma-value.html">pragma-value:</a></b>
<button id='x1479' onclick='hideorshow("x1479","x1480")'>hide</button></p>
 <div id='x1480' class='imgcontainer'>
 <img alt="syntax diagram pragma-value" src="images/syntax/pragma-value.gif" />
<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
<button id='x1481' onclick='hideorshow("x1481","x1482")'>show</button></p>
 <div id='x1482' style='display:none;' class='imgcontainer'>
 <img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
</div>
</div>
</div>


<p>
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<hr /><a name="toc"></a>
<h2>List Of PRAGMAs</h2>
<style>
#listtab30 tr td {vertical-align:top;}
</style>
<table id='listtab30' width='100%'></table>
<script>
var listitems30 = [{"u":"pragma.html#pragma_application_id","x":"application_id","s":0},
{"u":"pragma.html#pragma_auto_vacuum","x":"auto_vacuum","s":0},
{"u":"pragma.html#pragma_automatic_index","x":"automatic_index","s":0},
{"u":"pragma.html#pragma_busy_timeout","x":"busy_timeout","s":0},
{"u":"pragma.html#pragma_cache_size","x":"cache_size","s":0},
{"u":"pragma.html#pragma_cache_spill","x":"cache_spill","s":0},
{"u":"pragma.html#pragma_case_sensitive_like","x":"case_sensitive_like","s":0},
{"u":"pragma.html#pragma_cell_size_check","x":"cell_size_check","s":0},







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<hr /><a name="toc"></a>
<h2>List Of PRAGMAs</h2>
<style>
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</style>
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{"u":"pragma.html#pragma_case_sensitive_like","x":"case_sensitive_like","s":0},
{"u":"pragma.html#pragma_cell_size_check","x":"cell_size_check","s":0},
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{"u":"pragma.html#pragma_page_size","x":"page_size","s":0},
{"u":"pragma.html#pragma_parser_trace","x":"parser_trace","s":4},
{"u":"pragma.html#pragma_query_only","x":"query_only","s":0},
{"u":"pragma.html#pragma_quick_check","x":"quick_check","s":0},
{"u":"pragma.html#pragma_read_uncommitted","x":"read_uncommitted","s":0},
{"u":"pragma.html#pragma_recursive_triggers","x":"recursive_triggers","s":0},
{"u":"pragma.html#pragma_reverse_unordered_selects","x":"reverse_unordered_selects","s":0},
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{"u":"pragma.html#pragma_table_info","x":"table_info","s":0},
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{"u":"pragma.html#pragma_vdbe_listing","x":"vdbe_listing","s":4},
{"u":"pragma.html#pragma_vdbe_trace","x":"vdbe_trace","s":4},
{"u":"pragma.html#pragma_wal_autocheckpoint","x":"wal_autocheckpoint","s":0},
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document.getElementById("listtab30").innerHTML = h;
</script>

<p>Notes:
<ol>
<li>Pragmas whose names are <s>struck through</s>
are deprecated. Do not use them. They exist
for historical compatibility.







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document.getElementById("listtab28").innerHTML = h;
</script>

<p>Notes:
<ol>
<li>Pragmas whose names are <s>struck through</s>
are deprecated. Do not use them. They exist
for historical compatibility.
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       68 into the <a href="fileformat2.html#database_header">database header</a>.  Applications that use SQLite as their
       <a href="appfileformat.html">application file-format</a> should set the Application ID integer to
       a unique integer so that utilities such as 
       <a href="http://www.darwinsys.com/file/">file(1)</a> can determine the specific
       file type rather than just reporting "SQLite3 Database".  A list of
       assigned application IDs can be seen by consulting the
       <a href="http://www.sqlite.org/src/artifact?ci=trunk&filename=magic.txt">magic.txt</a> file in the SQLite source repository.


<a name="pragma_auto_vacuum"></a>
<h _id=pragma_auto_vacuum style="display:none"> PRAGMA auto_vacuum</h><hr>
    <p><b>PRAGMA </b><i>schema.</i><b>auto_vacuum;<br>
          PRAGMA </b><i>schema.</i><b>auto_vacuum = </b>
           <i>0 | NONE | 1 | FULL | 2 | INCREMENTAL</i><b>;</b></p>

    <p>Query or set the auto-vacuum status in the database.</p>







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       68 into the <a href="fileformat2.html#database_header">database header</a>.  Applications that use SQLite as their
       <a href="appfileformat.html">application file-format</a> should set the Application ID integer to
       a unique integer so that utilities such as 
       <a href="http://www.darwinsys.com/file/">file(1)</a> can determine the specific
       file type rather than just reporting "SQLite3 Database".  A list of
       assigned application IDs can be seen by consulting the
       <a href="http://www.sqlite.org/src/artifact?ci=trunk&filename=magic.txt">magic.txt</a> file in the SQLite source repository.

<p>   See also the <a href="pragma.html#pragma_user_version">user_version pragma</a>.
<a name="pragma_auto_vacuum"></a>
<h _id=pragma_auto_vacuum style="display:none"> PRAGMA auto_vacuum</h><hr>
    <p><b>PRAGMA </b><i>schema.</i><b>auto_vacuum;<br>
          PRAGMA </b><i>schema.</i><b>auto_vacuum = </b>
           <i>0 | NONE | 1 | FULL | 2 | INCREMENTAL</i><b>;</b></p>

    <p>Query or set the auto-vacuum status in the database.</p>
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    returns the current auto_vacuum mode.</p>
<a name="pragma_automatic_index"></a>
<h _id=pragma_automatic_index style="display:none"> PRAGMA automatic_index</h><hr>
    <p><b>PRAGMA automatic_index;
     <br>PRAGMA automatic_index = </b><i>boolean</i><b>;</b></p>

    <p>Query, set, or clear the <a href="optoverview.html#autoindex">automatic indexing</a> capability.
    <p><a href="optoverview.html#autoindex">Automatic indexing</a> is enabled by default as of version 3.7.17,

    but this might change in future releases of SQLite.
<a name="pragma_busy_timeout"></a>
<h _id=pragma_busy_timeout style="display:none"> PRAGMA busy_timeout</h><hr>
    <p><b>PRAGMA busy_timeout;
         <br>PRAGMA busy_timeout = </b><i>milliseconds</i><b>;</b></p>
    <p>Query or change the setting of the
    <a href="c3ref/busy_timeout.html">busy timeout</a>.







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    returns the current auto_vacuum mode.</p>
<a name="pragma_automatic_index"></a>
<h _id=pragma_automatic_index style="display:none"> PRAGMA automatic_index</h><hr>
    <p><b>PRAGMA automatic_index;
     <br>PRAGMA automatic_index = </b><i>boolean</i><b>;</b></p>

    <p>Query, set, or clear the <a href="optoverview.html#autoindex">automatic indexing</a> capability.
    <p><a href="optoverview.html#autoindex">Automatic indexing</a> is enabled by default as of 
    <a href="releaselog/3_7_17.html">version 3.7.17</a> (dateof:3.7.17]),
    but this might change in future releases of SQLite.
<a name="pragma_busy_timeout"></a>
<h _id=pragma_busy_timeout style="display:none"> PRAGMA busy_timeout</h><hr>
    <p><b>PRAGMA busy_timeout;
         <br>PRAGMA busy_timeout = </b><i>milliseconds</i><b>;</b></p>
    <p>Query or change the setting of the
    <a href="c3ref/busy_timeout.html">busy timeout</a>.
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    <p>If the argument N is positive then the suggested cache size is set 
    to N. If the argument N is negative, then the
    number of cache pages is adjusted to use approximately abs(N*1024) bytes
    of memory.
    <i>Backwards compatibility note:</i>
    The behavior of cache_size with a negative N
    was different in SQLite versions prior to 3.7.10.  In
    version 3.7.9 and earlier, the number of pages in the cache was set
    to the absolute value of N.</p>

    <p>When you change the cache size using the cache_size pragma, the
    change only endures for the current session.  The cache size reverts
    to the default value when the database is closed and reopened.</p>








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    <p>If the argument N is positive then the suggested cache size is set 
    to N. If the argument N is negative, then the
    number of cache pages is adjusted to use approximately abs(N*1024) bytes
    of memory.
    <i>Backwards compatibility note:</i>
    The behavior of cache_size with a negative N
    was different in prior to <a href="releaselog/3_7_10.html">version 3.7.10</a> (2012-01-16).  In
    version 3.7.9 and earlier, the number of pages in the cache was set
    to the absolute value of N.</p>

    <p>When you change the cache size using the cache_size pragma, the
    change only endures for the current session.  The cache size reverts
    to the default value when the database is closed and reopened.</p>

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    the first block of a file with zeros.  See also:
    <a href="pragma.html#pragma_journal_size_limit">PRAGMA journal_size_limit</a> and <a href="compile.html#default_journal_size_limit">SQLITE_DEFAULT_JOURNAL_SIZE_LIMIT</a>.</p>

    <p>The MEMORY journaling mode stores the rollback journal in 
    volatile RAM.  This saves disk I/O but at the expense of database
    safety and integrity.  If the application using SQLite crashes in
    the middle of a transaction when the MEMORY journaling mode is set,
    then the database file will very likely go corrupt.</p>


    <p>The WAL journaling mode uses a <a href="wal.html">write-ahead log</a> instead of a
    rollback journal to implement transactions.  The WAL journaling mode
    is persistent; after being set it stays in effect
    across multiple database connections and after closing and
    reopening the database.  A database in WAL journaling mode
    can only be accessed by SQLite version 3.7.0 or later.</p>


    <p>The OFF journaling mode disables the rollback journal completely.
    No rollback journal is ever created and hence there is never a rollback
    journal to delete.  The OFF journaling mode disables the atomic
    commit and rollback capabilities of SQLite. The <a href="lang_transaction.html">ROLLBACK</a> command
    no longer works; it behaves in an undefined way.  Applications must
    avoid using the <a href="lang_transaction.html">ROLLBACK</a> command when the journal mode is OFF.
    If the application crashes
    in the middle of a transaction when the OFF journaling mode is
    set, then the database file will very likely go corrupt.</p>


    <p>Note that the journal_mode for an <a href="inmemorydb.html">in-memory database</a>
    is either MEMORY or OFF and can not be changed to a different value.
    An attempt to change the journal_mode of an <a href="inmemorydb.html">in-memory database</a> to
    any setting other than MEMORY or OFF is ignored.  Note also that
    the journal_mode cannot be changed while a transaction is active.</p>
<a name="pragma_journal_size_limit"></a>







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    the first block of a file with zeros.  See also:
    <a href="pragma.html#pragma_journal_size_limit">PRAGMA journal_size_limit</a> and <a href="compile.html#default_journal_size_limit">SQLITE_DEFAULT_JOURNAL_SIZE_LIMIT</a>.</p>

    <p>The MEMORY journaling mode stores the rollback journal in 
    volatile RAM.  This saves disk I/O but at the expense of database
    safety and integrity.  If the application using SQLite crashes in
    the middle of a transaction when the MEMORY journaling mode is set,
    then the database file will very likely 
    <a href="howtocorrupt.html#cfgerr">go corrupt</a>.</p>

    <p>The WAL journaling mode uses a <a href="wal.html">write-ahead log</a> instead of a
    rollback journal to implement transactions.  The WAL journaling mode
    is persistent; after being set it stays in effect
    across multiple database connections and after closing and
    reopening the database.  A database in WAL journaling mode
    can only be accessed by SQLite <a href="releaselog/3_7_0.html">version 3.7.0</a> (2010-07-21)
    or later.</p>

    <p>The OFF journaling mode disables the rollback journal completely.
    No rollback journal is ever created and hence there is never a rollback
    journal to delete.  The OFF journaling mode disables the atomic
    commit and rollback capabilities of SQLite. The <a href="lang_transaction.html">ROLLBACK</a> command
    no longer works; it behaves in an undefined way.  Applications must
    avoid using the <a href="lang_transaction.html">ROLLBACK</a> command when the journal mode is OFF.
    If the application crashes
    in the middle of a transaction when the OFF journaling mode is
    set, then the database file will very likely
    <a href="howtocorrupt.html#cfgerr">go corrupt</a>.</p>

    <p>Note that the journal_mode for an <a href="inmemorydb.html">in-memory database</a>
    is either MEMORY or OFF and can not be changed to a different value.
    An attempt to change the journal_mode of an <a href="inmemorydb.html">in-memory database</a> to
    any setting other than MEMORY or OFF is ignored.  Note also that
    the journal_mode cannot be changed while a transaction is active.</p>
<a name="pragma_journal_size_limit"></a>
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    <p>Query or set the page size of the database. The page
    size must be a power of two between 512 and 65536 inclusive.
    </p>

    <p>When a new database is created, SQLite assigned a page size to
    the database based on platform and filesystem.  For many years,
    the default page size was almost always 1024 bytes, but beginning
    with SQLite <a href="releaselog/3_12_0.html">version 3.12.0</a> in 2016, the default page size increased

    to 4096.

    <p>The page_size pragma will only set in the
    page size if it is issued before any other SQL statements that
    cause I/O against the database file.
    SQL statements that cause I/O against the database file include
    "CREATE", "SELECT", "BEGIN IMMEDIATE", and "PRAGMA journal_mode=WAL".







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    <p>Query or set the page size of the database. The page
    size must be a power of two between 512 and 65536 inclusive.
    </p>

    <p>When a new database is created, SQLite assigned a page size to
    the database based on platform and filesystem.  For many years,
    the default page size was almost always 1024 bytes, but beginning
    with SQLite <a href="releaselog/3_12_0.html">version 3.12.0</a> (2016-03-29), 
    the default page size increased
    to 4096.

    <p>The page_size pragma will only set in the
    page size if it is issued before any other SQL statements that
    cause I/O against the database file.
    SQL statements that cause I/O against the database file include
    "CREATE", "SELECT", "BEGIN IMMEDIATE", and "PRAGMA journal_mode=WAL".
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    <p>Changing the recursive_triggers setting affects the execution of
       all statements prepared
       using the database connection, including those prepared before the
       setting was changed. Any existing statements prepared using the legacy 
       <a href="c3ref/prepare.html">sqlite3_prepare()</a> interface may fail with an <a href="rescode.html#schema">SQLITE_SCHEMA</a> error
       after the recursive_triggers setting is changed.


    <p>Prior to SQLite version 3.6.18, recursive triggers were not
    supported.  The behavior of SQLite was always as if this pragma was
    set to OFF.  Support for recursive triggers was added in version 3.6.18
    but was initially turned OFF by default, for compatibility.  Recursive
    triggers may be turned on by default in future versions of SQLite.
    </p>

    <p>The depth of recursion for triggers has a hard upper limit set by
    the <a href="limits.html#max_trigger_depth">SQLITE_MAX_TRIGGER_DEPTH</a> compile-time option and a run-time







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    <p>Changing the recursive_triggers setting affects the execution of
       all statements prepared
       using the database connection, including those prepared before the
       setting was changed. Any existing statements prepared using the legacy 
       <a href="c3ref/prepare.html">sqlite3_prepare()</a> interface may fail with an <a href="rescode.html#schema">SQLITE_SCHEMA</a> error
       after the recursive_triggers setting is changed.

    <p>Prior to SQLite <a href="releaselog/3_6_18.html">version 3.6.18</a> (2009-09-11), 
    recursive triggers were not supported.
    The behavior of SQLite was always as if this pragma was
    set to OFF.  Support for recursive triggers was added in version 3.6.18
    but was initially turned OFF by default, for compatibility.  Recursive
    triggers may be turned on by default in future versions of SQLite.
    </p>

    <p>The depth of recursion for triggers has a hard upper limit set by
    the <a href="limits.html#max_trigger_depth">SQLITE_MAX_TRIGGER_DEPTH</a> compile-time option and a run-time
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    output order might malfunction.  By running the application multiple
    times with this pragma both disabled and enabled, cases where the
    application makes faulty assumptions about output order can be
    identified and fixed early, reducing problems
    that might be caused by linking against a different version of SQLite.
    </p>
<a name="pragma_schema_version"></a>
<h _id=pragma_schema_version style="display:none"> PRAGMA schema_version, user_version</h><hr>
    <p><b>PRAGMA </b><i>schema.</i><b>schema_version; 
      <br>PRAGMA </b><i>schema.</i><b>schema_version = </b><i>integer </i><b>;
      <br>PRAGMA </b><i>schema.</i><b>user_version;
      <br>PRAGMA </b><i>schema.</i><b>user_version = </b><i>integer </i><b>;</b>

  
<p>    The pragmas schema_version and user_version are used to set or get
       the value of the schema-version and user-version, respectively. The
       schema-version and the user-version are big-endian 32-bit signed
       integers stored in the database header at offsets 40 and 60,
       respectively.</p>
  
<p>    The schema-version is usually only manipulated internally by SQLite.  
       It is incremented by SQLite whenever the database schema is modified 
       (by creating or dropping a table or index). The schema version is 
       used by SQLite each time a query is executed to ensure that the 
       internal cache of the schema used when compiling the SQL query matches 
       the schema of the database against which the compiled query is actually 

       executed.  Subverting this mechanism by using "PRAGMA schema_version" 



       to modify the schema-version is potentially dangerous and may lead 
       to program crashes or database corruption. Use with caution!</p>




  
<p>    The user-version is not used internally by SQLite. It may be used by



       applications for any purpose.</p>


<a name="pragma_secure_delete"></a>
<h _id=pragma_secure_delete style="display:none"> PRAGMA secure_delete</h><hr>
    <p><b>PRAGMA </b><i>schema.</i><b>secure_delete;
     <br>PRAGMA </b><i>schema.</i><b>secure_delete = </b><i>boolean</i></p>
    <p>Query or change the secure-delete setting. When secure_delete is
    on, SQLite overwrites deleted content with zeros.  The default
    setting for secure_delete is determined by the <a href="compile.html#secure_delete">SQLITE_SECURE_DELETE</a>







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    output order might malfunction.  By running the application multiple
    times with this pragma both disabled and enabled, cases where the
    application makes faulty assumptions about output order can be
    identified and fixed early, reducing problems
    that might be caused by linking against a different version of SQLite.
    </p>
<a name="pragma_schema_version"></a>
<h _id=pragma_schema_version style="display:none"> PRAGMA schema_version</h><hr>
    <p><b>PRAGMA </b><i>schema.</i><b>schema_version; 
      <br>PRAGMA </b><i>schema.</i><b>schema_version = </b><i>integer </i>;



<p>   The schema_version pragma will to get or set

       the value of the schema-version integer at offset 40 in the

       <a href="fileformat2.html#database_header">database header</a>. 


<p>    SQLite automatically increments the schema-version whenever the

       schema changes. As each SQL statement runs, the schema version is
       checked to ensure that the schema has not changed since the SQL


       statement was <a href="c3ref/prepare.html">prepared</a>.
       Subverting this mechanism by using "PRAGMA schema_version"
       my cause SQL statement to run using an obsolete schema,
       which can lead to incorrect answers and/or
       <a href="howtocorrupt.html#cfgerr">database corruption</a>.

       
    <p><span style='background-color: #ffff60;'>
    <b>Warning:</b>
    Misuse of this pragma can result in <a href="howtocorrupt.html#cfgerr">database corruption</a>.
    </span></p>
  

<p>    For the purposes of this pragma, the <a href="lang_vacuum.html">VACUUM</a> command is considered
       a schema change, since <a href="lang_vacuum.html">VACUUM</a> will usual alter the "rootpage"
       values for entries in the <a href="fileformat2.html#sqlite_master">sqlite_master table</a>.


<p>    See also the <a href="pragma.html#pragma_application_id">application_id pragma</a> and <a href="pragma.html#pragma_user_version">user_version pragma</a>.
<a name="pragma_secure_delete"></a>
<h _id=pragma_secure_delete style="display:none"> PRAGMA secure_delete</h><hr>
    <p><b>PRAGMA </b><i>schema.</i><b>secure_delete;
     <br>PRAGMA </b><i>schema.</i><b>secure_delete = </b><i>boolean</i></p>
    <p>Query or change the secure-delete setting. When secure_delete is
    on, SQLite overwrites deleted content with zeros.  The default
    setting for secure_delete is determined by the <a href="compile.html#secure_delete">SQLITE_SECURE_DELETE</a>
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    a catastrophic disk failure or some other unrecoverable hardware
    fault.  Many applications choose NORMAL when in <a href="wal.html">WAL mode</a>.</dd>
    <dt><b>OFF</b> (0)</dt>
    <dd>
    With synchronous OFF (0), SQLite continues without syncing
    as soon as it has handed data off to the operating system.
    If the application running SQLite crashes, the data will be safe, but
    the database might become corrupted if the operating system
    crashes or the computer loses power before that data has been written
    to the disk surface.  On the other hand, commits can be orders of
    magnitude faster with synchronous OFF.
    </dd></dl>
    </p>
 
    <p>In <a href="wal.html">WAL</a> mode when synchronous is NORMAL (1), the WAL file is







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    a catastrophic disk failure or some other unrecoverable hardware
    fault.  Many applications choose NORMAL when in <a href="wal.html">WAL mode</a>.</dd>
    <dt><b>OFF</b> (0)</dt>
    <dd>
    With synchronous OFF (0), SQLite continues without syncing
    as soon as it has handed data off to the operating system.
    If the application running SQLite crashes, the data will be safe, but
    the database <a href="howtocorrupt.html#cfgerr">might become corrupted</a> if the operating system
    crashes or the computer loses power before that data has been written
    to the disk surface.  On the other hand, commits can be orders of
    magnitude faster with synchronous OFF.
    </dd></dl>
    </p>
 
    <p>In <a href="wal.html">WAL</a> mode when synchronous is NORMAL (1), the WAL file is
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    unless it is changed using the <a href="compile.html#default_worker_threads">SQLITE_DEFAULT_WORKER_THREADS</a>
    compile-time option.  When the limit is zero, that means no
    auxiliary threads will be launched.</p>

    <p>This pragma is a thin wrapper around the
    <a href="c3ref/limit.html">sqlite3_limit</a>(db,<a href="c3ref/c_limit_attached.html#sqlitelimitworkerthreads">SQLITE_LIMIT_WORKER_THREADS</a>,...) interface.
    </p>













<a name="pragma_vdbe_addoptrace"></a>
<h _id=pragma_vdbe_addoptrace style="display:none"> PRAGMA vdbe_addoptrace</h><hr>
    <p><b>PRAGMA vdbe_addoptrace = </b><i>boolean</i><b>;</b></p>

    <p>If SQLite has been compiled with the <a href="compile.html#debug">SQLITE_DEBUG</a> compile-time
    option, then the vdbe_addoptrace pragma can be used to cause a complete
    VDBE opcodes to be displayed as they are created during code generation.







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    unless it is changed using the <a href="compile.html#default_worker_threads">SQLITE_DEFAULT_WORKER_THREADS</a>
    compile-time option.  When the limit is zero, that means no
    auxiliary threads will be launched.</p>

    <p>This pragma is a thin wrapper around the
    <a href="c3ref/limit.html">sqlite3_limit</a>(db,<a href="c3ref/c_limit_attached.html#sqlitelimitworkerthreads">SQLITE_LIMIT_WORKER_THREADS</a>,...) interface.
    </p>
<a name="pragma_user_version"></a>
<h _id=pragma_user_version style="display:none"> PRAGMA user_version</h><hr>
      <p><b>PRAGMA </b><i>schema.</i><b>user_version;
      <br>PRAGMA </b><i>schema.</i><b>user_version = </b><i>integer </i><b>;</b>

  
<p>    The user_version pragma will to get or set
       the value of the user-version integer at offset 60 in the
       <a href="fileformat2.html#database_header">database header</a>.  The user-version is an integer that is
       available to applications to use however they want.  SQLite
       makes no use of the user-version itself.

<p>    See also the <a href="pragma.html#pragma_application_id">application_id pragma</a> and <a href="pragma.html#pragma_schema_version">schema_version pragma</a>.
<a name="pragma_vdbe_addoptrace"></a>
<h _id=pragma_vdbe_addoptrace style="display:none"> PRAGMA vdbe_addoptrace</h><hr>
    <p><b>PRAGMA vdbe_addoptrace = </b><i>boolean</i><b>;</b></p>

    <p>If SQLite has been compiled with the <a href="compile.html#debug">SQLITE_DEBUG</a> compile-time
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<a name="pragma_writable_schema"></a>
<h _id=pragma_writable_schema style="display:none"> PRAGMA writable_schema</h><hr>
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<a name="pragma_writable_schema"></a>
<h _id=pragma_writable_schema style="display:none"> PRAGMA writable_schema</h><hr>
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<h1 align="center">List of SQLite Syntax Diagrams</h1>

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<h1 align="center">List of SQLite Syntax Diagrams</h1>

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<h1 align='center'>update-stmt-limited</h1>
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Used by:&nbsp;&nbsp; <a href='./sql-stmt.html'>sql-stmt</a><br></br>
References:&nbsp;&nbsp; <a href='./expr.html'>expr</a>&nbsp;&nbsp; <a href='./ordering-term.html'>ordering-term</a>&nbsp;&nbsp; <a href='./qualified-table-name.html'>qualified-table-name</a>&nbsp;&nbsp; <a href='./with-clause.html'>with-clause</a><br></br>
See also:&nbsp;&nbsp; <a href='../lang_update.html'>lang_update.html</a>
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<h1 align='center'>update-stmt-limited</h1>
<div class='imgcontainer'>
<img alt="syntax diagram update-stmt-limited" src="../images/syntax/update-stmt-limited.gif"></img><br>

Used by:&nbsp;&nbsp; <a href='./sql-stmt.html'>sql-stmt</a><br></br>
References:&nbsp;&nbsp; <a href='./column-name-list.html'>column-name-list</a>&nbsp;&nbsp; <a href='./expr.html'>expr</a>&nbsp;&nbsp; <a href='./ordering-term.html'>ordering-term</a>&nbsp;&nbsp; <a href='./qualified-table-name.html'>qualified-table-name</a>&nbsp;&nbsp; <a href='./with-clause.html'>with-clause</a><br></br>
See also:&nbsp;&nbsp; <a href='../lang_update.html'>lang_update.html</a>
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<h1 align='center'>update-stmt</h1>
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Used by:&nbsp;&nbsp; <a href='./create-trigger-stmt.html'>create-trigger-stmt</a>&nbsp;&nbsp; <a href='./sql-stmt.html'>sql-stmt</a><br></br>
References:&nbsp;&nbsp; <a href='./expr.html'>expr</a>&nbsp;&nbsp; <a href='./qualified-table-name.html'>qualified-table-name</a>&nbsp;&nbsp; <a href='./with-clause.html'>with-clause</a><br></br>
See also:&nbsp;&nbsp; <a href='../lang_createtrigger.html'>lang_createtrigger.html</a>&nbsp;&nbsp; <a href='../lang_update.html'>lang_update.html</a>
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<h1 align='center'>update-stmt</h1>
<div class='imgcontainer'>
<img alt="syntax diagram update-stmt" src="../images/syntax/update-stmt.gif"></img><br>

Used by:&nbsp;&nbsp; <a href='./create-trigger-stmt.html'>create-trigger-stmt</a>&nbsp;&nbsp; <a href='./sql-stmt.html'>sql-stmt</a><br></br>
References:&nbsp;&nbsp; <a href='./column-name-list.html'>column-name-list</a>&nbsp;&nbsp; <a href='./expr.html'>expr</a>&nbsp;&nbsp; <a href='./qualified-table-name.html'>qualified-table-name</a>&nbsp;&nbsp; <a href='./with-clause.html'>with-clause</a><br></br>
See also:&nbsp;&nbsp; <a href='../lang_createtrigger.html'>lang_createtrigger.html</a>&nbsp;&nbsp; <a href='../lang_update.html'>lang_update.html</a>
</div>


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Used by:&nbsp;&nbsp; <a href="#factored-select-stmt">factored-select-stmt</a>&nbsp;&nbsp; <a href="#select-stmt">select-stmt</a><br></br>
See also:&nbsp;&nbsp; <a href="lang_altertable.html">lang_altertable.html</a>&nbsp;&nbsp; <a href="lang_attach.html">lang_attach.html</a>&nbsp;&nbsp; <a href="lang_createindex.html">lang_createindex.html</a>&nbsp;&nbsp; <a href="lang_createtable.html">lang_createtable.html</a>&nbsp;&nbsp; <a href="lang_createtrigger.html">lang_createtrigger.html</a>&nbsp;&nbsp; <a href="lang_createview.html">lang_createview.html</a>&nbsp;&nbsp; <a href="lang_delete.html">lang_delete.html</a>&nbsp;&nbsp; <a href="lang_expr.html">lang_expr.html</a>&nbsp;&nbsp; <a href="lang_insert.html">lang_insert.html</a>&nbsp;&nbsp; <a href="lang_select.html">lang_select.html</a>&nbsp;&nbsp; <a href="lang_select.html#compound">lang_select.html#compound</a>&nbsp;&nbsp; <a href="lang_select.html#simpleselect">lang_select.html#simpleselect</a>&nbsp;&nbsp; <a href="lang_update.html">lang_update.html</a>&nbsp;&nbsp; <a href="lang_with.html">lang_with.html</a>&nbsp;&nbsp; <a href="lang_with.html#recursivecte">lang_with.html#recursivecte</a>&nbsp;&nbsp; <a href="partialindex.html">partialindex.html</a>
</div>

<a name="update-stmt"></a><h4>update-stmt:</h4><div class='imgcontainer'>
<img src="images/syntax/update-stmt.gif"></img><br></br>
Used by:&nbsp;&nbsp; <a href="#create-trigger-stmt">create-trigger-stmt</a>&nbsp;&nbsp; <a href="#sql-stmt">sql-stmt</a><br></br>
References:&nbsp;&nbsp; <a href="#expr">expr</a>&nbsp;&nbsp; <a href="#qualified-table-name">qualified-table-name</a>&nbsp;&nbsp; <a href="#with-clause">with-clause</a><br></br>






See also:&nbsp;&nbsp; <a href="lang_createtrigger.html">lang_createtrigger.html</a>&nbsp;&nbsp; <a href="lang_update.html">lang_update.html</a>
</div>

<a name="update-stmt-limited"></a><h4>update-stmt-limited:</h4><div class='imgcontainer'>
<img src="images/syntax/update-stmt-limited.gif"></img><br></br>
Used by:&nbsp;&nbsp; <a href="#sql-stmt">sql-stmt</a><br></br>
References:&nbsp;&nbsp; <a href="#expr">expr</a>&nbsp;&nbsp; <a href="#ordering-term">ordering-term</a>&nbsp;&nbsp; <a href="#qualified-table-name">qualified-table-name</a>&nbsp;&nbsp; <a href="#with-clause">with-clause</a><br></br>
See also:&nbsp;&nbsp; <a href="lang_update.html">lang_update.html</a>
</div>

<a name="qualified-table-name"></a><h4>qualified-table-name:</h4><div class='imgcontainer'>
<img src="images/syntax/qualified-table-name.gif"></img><br></br>
Used by:&nbsp;&nbsp; <a href="#delete-stmt">delete-stmt</a>&nbsp;&nbsp; <a href="#delete-stmt-limited">delete-stmt-limited</a>&nbsp;&nbsp; <a href="#update-stmt">update-stmt</a>&nbsp;&nbsp; <a href="#update-stmt-limited">update-stmt-limited</a><br></br>
See also:&nbsp;&nbsp; <a href="lang_createtrigger.html">lang_createtrigger.html</a>&nbsp;&nbsp; <a href="lang_delete.html">lang_delete.html</a>&nbsp;&nbsp; <a href="lang_indexedby.html">lang_indexedby.html</a>&nbsp;&nbsp; <a href="lang_update.html">lang_update.html</a>







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Used by:&nbsp;&nbsp; <a href="#factored-select-stmt">factored-select-stmt</a>&nbsp;&nbsp; <a href="#select-stmt">select-stmt</a><br></br>
See also:&nbsp;&nbsp; <a href="lang_altertable.html">lang_altertable.html</a>&nbsp;&nbsp; <a href="lang_attach.html">lang_attach.html</a>&nbsp;&nbsp; <a href="lang_createindex.html">lang_createindex.html</a>&nbsp;&nbsp; <a href="lang_createtable.html">lang_createtable.html</a>&nbsp;&nbsp; <a href="lang_createtrigger.html">lang_createtrigger.html</a>&nbsp;&nbsp; <a href="lang_createview.html">lang_createview.html</a>&nbsp;&nbsp; <a href="lang_delete.html">lang_delete.html</a>&nbsp;&nbsp; <a href="lang_expr.html">lang_expr.html</a>&nbsp;&nbsp; <a href="lang_insert.html">lang_insert.html</a>&nbsp;&nbsp; <a href="lang_select.html">lang_select.html</a>&nbsp;&nbsp; <a href="lang_select.html#compound">lang_select.html#compound</a>&nbsp;&nbsp; <a href="lang_select.html#simpleselect">lang_select.html#simpleselect</a>&nbsp;&nbsp; <a href="lang_update.html">lang_update.html</a>&nbsp;&nbsp; <a href="lang_with.html">lang_with.html</a>&nbsp;&nbsp; <a href="lang_with.html#recursivecte">lang_with.html#recursivecte</a>&nbsp;&nbsp; <a href="partialindex.html">partialindex.html</a>
</div>

<a name="update-stmt"></a><h4>update-stmt:</h4><div class='imgcontainer'>
<img src="images/syntax/update-stmt.gif"></img><br></br>
Used by:&nbsp;&nbsp; <a href="#create-trigger-stmt">create-trigger-stmt</a>&nbsp;&nbsp; <a href="#sql-stmt">sql-stmt</a><br></br>
References:&nbsp;&nbsp; <a href="#column-name-list">column-name-list</a>&nbsp;&nbsp; <a href="#expr">expr</a>&nbsp;&nbsp; <a href="#qualified-table-name">qualified-table-name</a>&nbsp;&nbsp; <a href="#with-clause">with-clause</a><br></br>
See also:&nbsp;&nbsp; <a href="lang_createtrigger.html">lang_createtrigger.html</a>&nbsp;&nbsp; <a href="lang_update.html">lang_update.html</a>
</div>

<a name="column-name-list"></a><h4>column-name-list:</h4><div class='imgcontainer'>
<img src="images/syntax/column-name-list.gif"></img><br></br>
Used by:&nbsp;&nbsp; <a href="#update-stmt">update-stmt</a>&nbsp;&nbsp; <a href="#update-stmt-limited">update-stmt-limited</a><br></br>
See also:&nbsp;&nbsp; <a href="lang_createtrigger.html">lang_createtrigger.html</a>&nbsp;&nbsp; <a href="lang_update.html">lang_update.html</a>
</div>

<a name="update-stmt-limited"></a><h4>update-stmt-limited:</h4><div class='imgcontainer'>
<img src="images/syntax/update-stmt-limited.gif"></img><br></br>
Used by:&nbsp;&nbsp; <a href="#sql-stmt">sql-stmt</a><br></br>
References:&nbsp;&nbsp; <a href="#column-name-list">column-name-list</a>&nbsp;&nbsp; <a href="#expr">expr</a>&nbsp;&nbsp; <a href="#ordering-term">ordering-term</a>&nbsp;&nbsp; <a href="#qualified-table-name">qualified-table-name</a>&nbsp;&nbsp; <a href="#with-clause">with-clause</a><br></br>
See also:&nbsp;&nbsp; <a href="lang_update.html">lang_update.html</a>
</div>

<a name="qualified-table-name"></a><h4>qualified-table-name:</h4><div class='imgcontainer'>
<img src="images/syntax/qualified-table-name.gif"></img><br></br>
Used by:&nbsp;&nbsp; <a href="#delete-stmt">delete-stmt</a>&nbsp;&nbsp; <a href="#delete-stmt-limited">delete-stmt-limited</a>&nbsp;&nbsp; <a href="#update-stmt">update-stmt</a>&nbsp;&nbsp; <a href="#update-stmt-limited">update-stmt-limited</a><br></br>
See also:&nbsp;&nbsp; <a href="lang_createtrigger.html">lang_createtrigger.html</a>&nbsp;&nbsp; <a href="lang_delete.html">lang_delete.html</a>&nbsp;&nbsp; <a href="lang_indexedby.html">lang_indexedby.html</a>&nbsp;&nbsp; <a href="lang_update.html">lang_update.html</a>
Changes to Doc/Special/Core/vtab.html.
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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>

<li><a href='docs.html'>Documentation</a>

<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">







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<li class='search' id='search_menubutton'>
<a href="javascript:void(0)" onclick='toggle_div("searchmenu")'>Search</a>
</ul>
</div>
<div class="menu submenu" id="submenu">
<ul>
<li><a href='about.html'>About</a>
<li><a href='docs.html'>Documentation</a>
<li><a href='download.html'>Download</a>
<li><a href='support.html'>Support</a>
<li><a href='prosupport.html'>Purchase</a>
</ul>
</div>
<div class="searchmenu" id="searchmenu">
<form method="GET" action="search">
<span class="desktoponly">Search for:</span> <input type="text" name="q">
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<h2 id="usage"><span>1.1. </span>Usage</h2>

<p>A virtual table is created using a <a href="lang_createvtab.html">CREATE VIRTUAL TABLE</a> statement.

<p><b><a href="syntax/create-virtual-table-stmt.html">create-virtual-table-stmt:</a></b>
<button id='x1475' onclick='hideorshow("x1475","x1476")'>hide</button></p>
 <div id='x1476' class='imgcontainer'>
 <img alt="syntax diagram create-virtual-table-stmt" src="images/syntax/create-virtual-table-stmt.gif" />
</div>


</p><p>The CREATE VIRTUAL TABLE statement creates a new table
called <span class='yyterm'>table-name</span> derived from the class
class <span class='yyterm'>module-name</span>.  The <span class='yyterm'>module-name</span>







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<h2 id="usage"><span>1.1. </span>Usage</h2>

<p>A virtual table is created using a <a href="lang_createvtab.html">CREATE VIRTUAL TABLE</a> statement.

<p><b><a href="syntax/create-virtual-table-stmt.html">create-virtual-table-stmt:</a></b>
<button id='x1483' onclick='hideorshow("x1483","x1484")'>hide</button></p>
 <div id='x1484' class='imgcontainer'>
 <img alt="syntax diagram create-virtual-table-stmt" src="images/syntax/create-virtual-table-stmt.gif" />
</div>


</p><p>The CREATE VIRTUAL TABLE statement creates a new table
called <span class='yyterm'>table-name</span> derived from the class
class <span class='yyterm'>module-name</span>.  The <span class='yyterm'>module-name</span>
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<p>If the <a href="vtab.html#xcreate">xCreate</a> method is NULL, then
<a href="lang_createvtab.html">CREATE VIRTUAL TABLE</a> statements are prohibited for that virtual table,
and the virtual table is an "eponymous-only virtual table".
Eponymous-only virtual tables are useful as 
<a href="vtab.html#tabfunc2">table-valued functions</a>.

</p><p>

Note that SQLite versions prior to 3.9.0 did not check the xCreate method
for NULL before invoking it.  So if an eponymous-only virtual table is

registered with SQLite version 3.8.11.1 or earlier and a <a href="lang_createvtab.html">CREATE VIRTUAL TABLE</a>
command is attempted against that virtual table module, a jump to a NULL
pointer will occur, resulting in a crash.

</p><h2 id="implementation"><span>1.2. </span>Implementation</h2>

<p>Several new C-level objects are used by the virtual table implementation:








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<p>If the <a href="vtab.html#xcreate">xCreate</a> method is NULL, then
<a href="lang_createvtab.html">CREATE VIRTUAL TABLE</a> statements are prohibited for that virtual table,
and the virtual table is an "eponymous-only virtual table".
Eponymous-only virtual tables are useful as 
<a href="vtab.html#tabfunc2">table-valued functions</a>.

</p><p>
Note that prior to <a href="releaselog/3_9_0.html">version 3.9.0</a> (2015-10-14), 
SQLite did not check the xCreate method
for NULL before invoking it.  So if an eponymous-only virtual table is
registered with SQLite <a href="releaselog/3_8_11_1.html">version 3.8.11.1</a> (2015-07-29)
or earlier and a <a href="lang_createvtab.html">CREATE VIRTUAL TABLE</a>
command is attempted against that virtual table module, a jump to a NULL
pointer will occur, resulting in a crash.

</p><h2 id="implementation"><span>1.2. </span>Implementation</h2>

<p>Several new C-level objects are used by the virtual table implementation:

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</p><p>The rest of the module structure consists of methods used to implement
various features of the virtual table. Details on what each of these 
methods do are provided in the sequel.

</p><h2 id="virtual_tables_and_shared_cache"><span>1.3. </span>Virtual Tables And Shared Cache</h2>

<p>Prior to SQLite <a href="releaselog/3_6_17.html">version 3.6.17</a>, the virtual table mechanism assumes 

that each <a href="c3ref/sqlite3.html">database connection</a> kept
its own copy of the database schema. Hence, the virtual table mechanism
could not be used in a database that has <a href="sharedcache.html">shared cache mode</a> enabled. 
The <a href="c3ref/create_module.html">sqlite3_create_module()</a> interface would return an error if 
<a href="sharedcache.html">shared cache mode</a> is enabled.  That restriction was relaxed
beginning with SQLite <a href="releaselog/3_6_17.html">version 3.6.17</a>.








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</p><p>The rest of the module structure consists of methods used to implement
various features of the virtual table. Details on what each of these 
methods do are provided in the sequel.

</p><h2 id="virtual_tables_and_shared_cache"><span>1.3. </span>Virtual Tables And Shared Cache</h2>

<p>Prior to SQLite <a href="releaselog/3_6_17.html">version 3.6.17</a> (2009-08-10), 
the virtual table mechanism assumes 
that each <a href="c3ref/sqlite3.html">database connection</a> kept
its own copy of the database schema. Hence, the virtual table mechanism
could not be used in a database that has <a href="sharedcache.html">shared cache mode</a> enabled. 
The <a href="c3ref/create_module.html">sqlite3_create_module()</a> interface would return an error if 
<a href="sharedcache.html">shared cache mode</a> is enabled.  That restriction was relaxed
beginning with SQLite <a href="releaselog/3_6_17.html">version 3.6.17</a>.

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unconstrained.  However, an error results if there are more arguments
than there are hidden columns in the virtual table.

<a name="worid"></a>

</p><h3 id="_without_rowid_virtual_tables_"><span>2.1.3. </span> WITHOUT ROWID Virtual Tables </h3>

<p>Beginning with SQLite <a href="releaselog/3_14.html">version 3.14.0</a>, the CREATE TABLE statement that

is passed into <a href="c3ref/declare_vtab.html">sqlite3_declare_vtab()</a> may contain a <a href="withoutrowid.html">WITHOUT ROWID</a> clause.
This is useful for cases where the virtual table rows 
cannot easily be mapped into unique integers.  A CREATE TABLE
statement that includes WITHOUT ROWID must define one or more columns as
the PRIMARY KEY.  Every column of the PRIMARY KEY must individually be
NOT NULL and all columns for each row must be collectively unique.








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unconstrained.  However, an error results if there are more arguments
than there are hidden columns in the virtual table.

<a name="worid"></a>

</p><h3 id="_without_rowid_virtual_tables_"><span>2.1.3. </span> WITHOUT ROWID Virtual Tables </h3>

<p>Beginning with SQLite <a href="releaselog/3_14.html">version 3.14.0</a> (2016-08-08), 
the CREATE TABLE statement that
is passed into <a href="c3ref/declare_vtab.html">sqlite3_declare_vtab()</a> may contain a <a href="withoutrowid.html">WITHOUT ROWID</a> clause.
This is useful for cases where the virtual table rows 
cannot easily be mapped into unique integers.  A CREATE TABLE
statement that includes WITHOUT ROWID must define one or more columns as
the PRIMARY KEY.  Every column of the PRIMARY KEY must individually be
NOT NULL and all columns for each row must be collectively unique.

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If all terms of the ORDER BY clause are columns in the virtual table, 
then nOrderBy will be the number of terms in the ORDER BY clause 
and the aOrderBy[] array will identify the column for each term 
in the order by clause and whether or not that column is ASC or DESC.

<a name="colUsed"></a>


</p><p>In SQLite version 3.10.0 and later, the colUsed field is available
to indicate which fields of the virtual table are actually used by the
statement being prepared.  If the lowest bit of colUsed is set, that
means that the first column is used.  The second lowest bit corresponds
to the second column.  And so forth.  If the most significant bit of
colUsed is set, that means that one or more columns other than the 
first 63 columns are used.  If column usage information is needed by the
<a href="vtab.html#xfilter">xFilter</a> method, then the required bits must be encoded into either







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If all terms of the ORDER BY clause are columns in the virtual table, 
then nOrderBy will be the number of terms in the ORDER BY clause 
and the aOrderBy[] array will identify the column for each term 
in the order by clause and whether or not that column is ASC or DESC.

<a name="colUsed"></a>

</p><p>In SQLite <a href="releaselog/3_10_0.html">version 3.10.0</a> (2016-01-06) and later, 
the colUsed field is available
to indicate which fields of the virtual table are actually used by the
statement being prepared.  If the lowest bit of colUsed is set, that
means that the first column is used.  The second lowest bit corresponds
to the second column.  And so forth.  If the most significant bit of
colUsed is set, that means that one or more columns other than the 
first 63 columns are used.  If column usage information is needed by the
<a href="vtab.html#xfilter">xFilter</a> method, then the required bits must be encoded into either
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object itself.

</p><blockquote>
<dl>
<dt><b>argc = 1</b>
</dt><dd><p>The single row with rowid equal to argv[0] is deleted. No insert occurs.

</p></dd><dt><b>argc > 1 <br> argv[0] = NULL</br></b>
</dt><dd><p>A new row is inserted with a rowid argv[1] and column values in
       argv[2] and following.  If argv[1] is an SQL NULL,
       the a new unique rowid is generated automatically.

</p></dd><dt><b>argc > 1 <br> argv[0] &ne; NULL </br><br> argv[0] = argv[1]</br></b>
</dt><dd><p>The row with rowid argv[0] is updated with new values 
       in argv[2] and following parameters.

</p></dd><dt><b>argc > 1 <br> argv[0] &ne; NULL </br><br> argv[0] &ne; argv[1]</br></b>
</dt><dd><p> The row with rowid argv[0] is updated with rowid argv[1] 
and new values in argv[2] and following parameters. This will occur 
when an SQL statement updates a rowid, as in the statement:
</p><blockquote>
   <a href="lang_update.html">UPDATE</a> table SET rowid=rowid+1 WHERE ...; 
</blockquote>
</dd></dl>







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object itself.

</p><blockquote>
<dl>
<dt><b>argc = 1</b>
</dt><dd><p>The single row with rowid equal to argv[0] is deleted. No insert occurs.

</p></dd><dt><b>argc &gt; 1 <br> argv[0] = NULL</b>
</dt><dd><p>A new row is inserted with a rowid argv[1] and column values in
       argv[2] and following.  If argv[1] is an SQL NULL,
       the a new unique rowid is generated automatically.

</p></dd><dt><b>argc &gt; 1 <br> argv[0] &ne; NULL <br> argv[0] = argv[1]</b>
</dt><dd><p>The row with rowid argv[0] is updated with new values 
       in argv[2] and following parameters.

</p></dd><dt><b>argc &gt; 1 <br> argv[0] &ne; NULL <br> argv[0] &ne; argv[1]</b>
</dt><dd><p> The row with rowid argv[0] is updated with rowid argv[1] 
and new values in argv[2] and following parameters. This will occur 
when an SQL statement updates a rowid, as in the statement:
</p><blockquote>
   <a href="lang_update.html">UPDATE</a> table SET rowid=rowid+1 WHERE ...; 
</blockquote>
</dd></dl>
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int (*xRelease)(sqlite3_vtab *pVtab, int);
int (*xRollbackTo)(sqlite3_vtab *pVtab, int);
</pre></div>

<p>
These methods provide the virtual table implementation an opportunity to
implement nested transactions.  They are always optional and will only be
called in SQLite <a href="releaselog/3_7_7.html">version 3.7.7</a> and later.
</p>

<p>
When xSavepoint(X,N) is invoked, that is a signal to the virtual table X
that it should save its current state as savepoint N.  
A subsequent call
to xRollbackTo(X,R) means that the state of the virtual table should return







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int (*xRelease)(sqlite3_vtab *pVtab, int);
int (*xRollbackTo)(sqlite3_vtab *pVtab, int);
</pre></div>

<p>
These methods provide the virtual table implementation an opportunity to
implement nested transactions.  They are always optional and will only be
called in SQLite <a href="releaselog/3_7_7.html">version 3.7.7</a> (2011-06-23) and later.
</p>

<p>
When xSavepoint(X,N) is invoked, that is a signal to the virtual table X
that it should save its current state as savepoint N.  
A subsequent call
to xRollbackTo(X,R) means that the state of the virtual table should return
Changes to Doc/buildChm.tcl.
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  set data [readFile $fileName]

  #
  # NOTE: No replacements made yet.
  #
  set count 0















  #
  # NOTE: Process all "href" attribute values from the data.  This pattern is
  #       not univeral; however, as of this writing (Feb 2014), the core docs
  #       are using it consistently.
  #


  foreach {dummy href} [regexp -all -inline -nocase -- {href="(.*?)"} $data] {
    #
    # NOTE: Skip all references to other items on this page.
    #
    if {[string index $href 0] eq "#"} then {
      continue
    }








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  set data [readFile $fileName]

  #
  # NOTE: No replacements made yet.
  #
  set count 0

  #
  # NOTE: Remove references to "!location.origin.match(/http/)" because the
  #       "match" property does not work in the CHM viewer.  Use the literal
  #       string syntax supported by the regular expression engine here.
  #
  set pattern(1) "***=!location.origin.match(/http/)"
  set subSpec(1) 1

  #
  # NOTE: Perform the replacements, if any, keeping track of how many were
  #       done.
  #
  incr count [regsub -all -- $pattern(1) $data $subSpec(1) data]

  #
  # NOTE: Process all "href" attribute values from the data.  This pattern is
  #       not univeral; however, as of this writing (Feb 2014), the core docs
  #       are using it consistently.
  #
  set pattern(2) {href=['"](.*?)['"]}

  foreach {dummy href} [regexp -all -inline -nocase -- $pattern(2) $data] {
    #
    # NOTE: Skip all references to other items on this page.
    #
    if {[string index $href 0] eq "#"} then {
      continue
    }

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    if {[file exists [file join $directory $part1]]} then {
      continue
    }

    #
    # NOTE: Replace the reference with an absolute reference using the base
    #       URL specified by the caller, escaping it as necessary for use
    #       with [regsub].

    #
    set pattern "***=$dummy"; # NOTE: Use literal string syntax.
    set subSpec "href=\"[escapeSubSpec $url$href]\""

    #
    # NOTE: Perform the replacements, if any, keeping track of how many were
    #       done.
    #
    incr count [regsub -all -- $pattern $data $subSpec data]
  }

  #
  # NOTE: Issue a warning if the "href" pattern was not matched.
  #
  if {$count == 0} then {
    puts stdout "*WARNING* File \"$fileName\" does not match: href=\"(.*?)\""







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    if {[file exists [file join $directory $part1]]} then {
      continue
    }

    #
    # NOTE: Replace the reference with an absolute reference using the base
    #       URL specified by the caller, escaping it as necessary for use
    #       with [regsub].  Use the literal string syntax supported by the
    #       regular expression engine here.
    #
    set pattern(3) "***=$dummy"
    set subSpec(3) "href=\"[escapeSubSpec $url$href]\""

    #
    # NOTE: Perform the replacements, if any, keeping track of how many were
    #       done.
    #
    incr count [regsub -all -- $pattern(3) $data $subSpec(3) data]
  }

  #
  # NOTE: Issue a warning if the "href" pattern was not matched.
  #
  if {$count == 0} then {
    puts stdout "*WARNING* File \"$fileName\" does not match: href=\"(.*?)\""
Changes to System.Data.SQLite/ISQLiteNativeModule.cs.
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        /// Arguments on the virtual table name are matched to hidden columns
        /// in order.  The number of arguments can be less than the
        /// number of hidden columns, in which case the latter hidden columns are
        /// unconstrained.  However, an error results if there are more arguments
        /// than there are hidden columns in the virtual table.
        /// </para>
        /// <para>
        /// Beginning with SQLite version 3.14.0, the CREATE TABLE statement that

        /// is passed into sqlite3_declare_vtab() may contain a WITHOUT ROWID clause.
        /// This is useful for cases where the virtual table rows 
        /// cannot easily be mapped into unique integers.  A CREATE TABLE
        /// statement that includes WITHOUT ROWID must define one or more columns as
        /// the PRIMARY KEY.  Every column of the PRIMARY KEY must individually be
        /// NOT NULL and all columns for each row must be collectively unique.
        /// </para>







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        /// Arguments on the virtual table name are matched to hidden columns
        /// in order.  The number of arguments can be less than the
        /// number of hidden columns, in which case the latter hidden columns are
        /// unconstrained.  However, an error results if there are more arguments
        /// than there are hidden columns in the virtual table.
        /// </para>
        /// <para>
        /// Beginning with SQLite version 3.14.0 (2016-08-08), 
        /// the CREATE TABLE statement that
        /// is passed into sqlite3_declare_vtab() may contain a WITHOUT ROWID clause.
        /// This is useful for cases where the virtual table rows 
        /// cannot easily be mapped into unique integers.  A CREATE TABLE
        /// statement that includes WITHOUT ROWID must define one or more columns as
        /// the PRIMARY KEY.  Every column of the PRIMARY KEY must individually be
        /// NOT NULL and all columns for each row must be collectively unique.
        /// </para>
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        /// should not make any difference to the xBestIndex method.) 
        /// If all terms of the ORDER BY clause are columns in the virtual table, 
        /// then nOrderBy will be the number of terms in the ORDER BY clause 
        /// and the aOrderBy[] array will identify the column for each term 
        /// in the order by clause and whether or not that column is ASC or DESC.
        /// </para>
        /// <para>
        /// In SQLite version 3.10.0 and later, the colUsed field is available

        /// to indicate which fields of the virtual table are actually used by the
        /// statement being prepared.  If the lowest bit of colUsed is set, that
        /// means that the first column is used.  The second lowest bit corresponds
        /// to the second column.  And so forth.  If the most significant bit of
        /// colUsed is set, that means that one or more columns other than the 
        /// first 63 columns are used.  If column usage information is needed by the
        /// xFilter method, then the required bits must be encoded into either







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        /// should not make any difference to the xBestIndex method.) 
        /// If all terms of the ORDER BY clause are columns in the virtual table, 
        /// then nOrderBy will be the number of terms in the ORDER BY clause 
        /// and the aOrderBy[] array will identify the column for each term 
        /// in the order by clause and whether or not that column is ASC or DESC.
        /// </para>
        /// <para>
        /// In SQLite version 3.10.0 (2016-01-06) and later, 
        /// the colUsed field is available
        /// to indicate which fields of the virtual table are actually used by the
        /// statement being prepared.  If the lowest bit of colUsed is set, that
        /// means that the first column is used.  The second lowest bit corresponds
        /// to the second column.  And so forth.  If the most significant bit of
        /// colUsed is set, that means that one or more columns other than the 
        /// first 63 columns are used.  If column usage information is needed by the
        /// xFilter method, then the required bits must be encoded into either
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        /// held within the argv[i] object, not the argv[i]
        /// object itself.
        /// </para>
        /// <para><code>
        /// <![CDATA[<dl>]]>
        /// <![CDATA[<dt>]]><![CDATA[<b>]]>argc = 1<![CDATA[</b>]]>
        /// <![CDATA[</dt>]]><![CDATA[<dd>]]>The single row with rowid equal to argv[0] is deleted. No insert occurs.
        /// <![CDATA[</dd>]]><![CDATA[<dt>]]><![CDATA[<b>]]>argc &gt; 1 <![CDATA[<br>]]> argv[0] = NULL<![CDATA[</br>]]><![CDATA[</b>]]>
        /// <![CDATA[</dt>]]><![CDATA[<dd>]]>A new row is inserted with a rowid argv[1] and column values in
        ///        argv[2] and following.  If argv[1] is an SQL NULL,
        ///        the a new unique rowid is generated automatically.
        /// <![CDATA[</dd>]]><![CDATA[<dt>]]><![CDATA[<b>]]>argc &gt; 1 <![CDATA[<br>]]> argv[0] &#8800; NULL <![CDATA[</br>]]><![CDATA[<br>]]> argv[0] = argv[1]<![CDATA[</br>]]><![CDATA[</b>]]>
        /// <![CDATA[</dt>]]><![CDATA[<dd>]]>The row with rowid argv[0] is updated with new values 
        ///        in argv[2] and following parameters.
        /// <![CDATA[</dd>]]><![CDATA[<dt>]]><![CDATA[<b>]]>argc &gt; 1 <![CDATA[<br>]]> argv[0] &#8800; NULL <![CDATA[</br>]]><![CDATA[<br>]]> argv[0] &#8800; argv[1]<![CDATA[</br>]]><![CDATA[</b>]]>
        /// <![CDATA[</dt>]]><![CDATA[<dd>]]> The row with rowid argv[0] is updated with rowid argv[1] 
        /// and new values in argv[2] and following parameters. This will occur 
        /// when an SQL statement updates a rowid, as in the statement:
        /// <para><code>
        ///    UPDATE table SET rowid=rowid+1 WHERE ...; 
        /// </code></para>
        /// <![CDATA[</dd>]]><![CDATA[</dl>]]>







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        /// held within the argv[i] object, not the argv[i]
        /// object itself.
        /// </para>
        /// <para><code>
        /// <![CDATA[<dl>]]>
        /// <![CDATA[<dt>]]><![CDATA[<b>]]>argc = 1<![CDATA[</b>]]>
        /// <![CDATA[</dt>]]><![CDATA[<dd>]]>The single row with rowid equal to argv[0] is deleted. No insert occurs.
        /// <![CDATA[</dd>]]><![CDATA[<dt>]]><![CDATA[<b>]]>argc &gt; 1 <![CDATA[<br>]]> argv[0] = NULL<![CDATA[</b>]]>
        /// <![CDATA[</dt>]]><![CDATA[<dd>]]>A new row is inserted with a rowid argv[1] and column values in
        ///        argv[2] and following.  If argv[1] is an SQL NULL,
        ///        the a new unique rowid is generated automatically.
        /// <![CDATA[</dd>]]><![CDATA[<dt>]]><![CDATA[<b>]]>argc &gt; 1 <![CDATA[<br>]]> argv[0] &#8800; NULL <![CDATA[<br>]]> argv[0] = argv[1]<![CDATA[</b>]]>
        /// <![CDATA[</dt>]]><![CDATA[<dd>]]>The row with rowid argv[0] is updated with new values 
        ///        in argv[2] and following parameters.
        /// <![CDATA[</dd>]]><![CDATA[<dt>]]><![CDATA[<b>]]>argc &gt; 1 <![CDATA[<br>]]> argv[0] &#8800; NULL <![CDATA[<br>]]> argv[0] &#8800; argv[1]<![CDATA[</b>]]>
        /// <![CDATA[</dt>]]><![CDATA[<dd>]]> The row with rowid argv[0] is updated with rowid argv[1] 
        /// and new values in argv[2] and following parameters. This will occur 
        /// when an SQL statement updates a rowid, as in the statement:
        /// <para><code>
        ///    UPDATE table SET rowid=rowid+1 WHERE ...; 
        /// </code></para>
        /// <![CDATA[</dd>]]><![CDATA[</dl>]]>
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        /// int (*xSavepoint)(sqlite3_vtab *pVtab, int);
        /// int (*xRelease)(sqlite3_vtab *pVtab, int);
        /// int (*xRollbackTo)(sqlite3_vtab *pVtab, int);
        /// </code></para>
        /// <para>
        /// These methods provide the virtual table implementation an opportunity to
        /// implement nested transactions.  They are always optional and will only be
        /// called in SQLite version 3.7.7 and later.
        /// </para>
        /// <para>
        /// When xSavepoint(X,N) is invoked, that is a signal to the virtual table X
        /// that it should save its current state as savepoint N.  
        /// A subsequent call
        /// to xRollbackTo(X,R) means that the state of the virtual table should return
        /// to what it was when xSavepoint(X,R) was last called.  







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        /// int (*xSavepoint)(sqlite3_vtab *pVtab, int);
        /// int (*xRelease)(sqlite3_vtab *pVtab, int);
        /// int (*xRollbackTo)(sqlite3_vtab *pVtab, int);
        /// </code></para>
        /// <para>
        /// These methods provide the virtual table implementation an opportunity to
        /// implement nested transactions.  They are always optional and will only be
        /// called in SQLite version 3.7.7 (2011-06-23) and later.
        /// </para>
        /// <para>
        /// When xSavepoint(X,N) is invoked, that is a signal to the virtual table X
        /// that it should save its current state as savepoint N.  
        /// A subsequent call
        /// to xRollbackTo(X,R) means that the state of the virtual table should return
        /// to what it was when xSavepoint(X,R) was last called.  
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        /// int (*xSavepoint)(sqlite3_vtab *pVtab, int);
        /// int (*xRelease)(sqlite3_vtab *pVtab, int);
        /// int (*xRollbackTo)(sqlite3_vtab *pVtab, int);
        /// </code></para>
        /// <para>
        /// These methods provide the virtual table implementation an opportunity to
        /// implement nested transactions.  They are always optional and will only be
        /// called in SQLite version 3.7.7 and later.
        /// </para>
        /// <para>
        /// When xSavepoint(X,N) is invoked, that is a signal to the virtual table X
        /// that it should save its current state as savepoint N.  
        /// A subsequent call
        /// to xRollbackTo(X,R) means that the state of the virtual table should return
        /// to what it was when xSavepoint(X,R) was last called.  







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        /// int (*xSavepoint)(sqlite3_vtab *pVtab, int);
        /// int (*xRelease)(sqlite3_vtab *pVtab, int);
        /// int (*xRollbackTo)(sqlite3_vtab *pVtab, int);
        /// </code></para>
        /// <para>
        /// These methods provide the virtual table implementation an opportunity to
        /// implement nested transactions.  They are always optional and will only be
        /// called in SQLite version 3.7.7 (2011-06-23) and later.
        /// </para>
        /// <para>
        /// When xSavepoint(X,N) is invoked, that is a signal to the virtual table X
        /// that it should save its current state as savepoint N.  
        /// A subsequent call
        /// to xRollbackTo(X,R) means that the state of the virtual table should return
        /// to what it was when xSavepoint(X,R) was last called.  
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        /// int (*xSavepoint)(sqlite3_vtab *pVtab, int);
        /// int (*xRelease)(sqlite3_vtab *pVtab, int);
        /// int (*xRollbackTo)(sqlite3_vtab *pVtab, int);
        /// </code></para>
        /// <para>
        /// These methods provide the virtual table implementation an opportunity to
        /// implement nested transactions.  They are always optional and will only be
        /// called in SQLite version 3.7.7 and later.
        /// </para>
        /// <para>
        /// When xSavepoint(X,N) is invoked, that is a signal to the virtual table X
        /// that it should save its current state as savepoint N.  
        /// A subsequent call
        /// to xRollbackTo(X,R) means that the state of the virtual table should return
        /// to what it was when xSavepoint(X,R) was last called.  







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        /// int (*xSavepoint)(sqlite3_vtab *pVtab, int);
        /// int (*xRelease)(sqlite3_vtab *pVtab, int);
        /// int (*xRollbackTo)(sqlite3_vtab *pVtab, int);
        /// </code></para>
        /// <para>
        /// These methods provide the virtual table implementation an opportunity to
        /// implement nested transactions.  They are always optional and will only be
        /// called in SQLite version 3.7.7 (2011-06-23) and later.
        /// </para>
        /// <para>
        /// When xSavepoint(X,N) is invoked, that is a signal to the virtual table X
        /// that it should save its current state as savepoint N.  
        /// A subsequent call
        /// to xRollbackTo(X,R) means that the state of the virtual table should return
        /// to what it was when xSavepoint(X,R) was last called.