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<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/select_into.sgml,v 1.21 2002/11/21 23:34:43 petere Exp $
PostgreSQL documentation
-->
<refentry id="SQL-SELECTINTO">
<refmeta>
<refentrytitle id="SQL-SELECTINTO-TITLE">SELECT INTO</refentrytitle>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>
SELECT INTO
</refname>
<refpurpose>
create a new table from the results of a query
</refpurpose></refnamediv>
<refsynopsisdiv>
<refsynopsisdivinfo>
<date>2000-12-11</date>
</refsynopsisdivinfo>
<synopsis>
SELECT [ ALL | DISTINCT [ ON ( <replaceable class="PARAMETER">expression</replaceable> [, ...] ) ] ]
* | <replaceable class="PARAMETER">expression</replaceable> [ AS <replaceable class="PARAMETER">output_name</replaceable> ] [, ...]
INTO [ TEMPORARY | TEMP ] [ TABLE ] <replaceable class="PARAMETER">new_table</replaceable>
[ FROM <replaceable class="PARAMETER">from_item</replaceable> [, ...] ]
[ WHERE <replaceable class="PARAMETER">condition</replaceable> ]
[ GROUP BY <replaceable class="PARAMETER">expression</replaceable> [, ...] ]
[ HAVING <replaceable class="PARAMETER">condition</replaceable> [, ...] ]
[ { UNION | INTERSECT | EXCEPT } [ ALL ] <replaceable class="PARAMETER">select</replaceable> ]
[ ORDER BY <replaceable class="PARAMETER">expression</replaceable> [ ASC | DESC | USING <replaceable class="PARAMETER">operator</replaceable> ] [, ...] ]
[ LIMIT { <replaceable class="PARAMETER">count</replaceable> | ALL } ]
[ OFFSET <replaceable class="PARAMETER">start</replaceable> ]
[ FOR UPDATE [ OF <replaceable class="PARAMETER">tablename</replaceable> [, ...] ] ]
</synopsis>
<refsect2 id="R2-SQL-SELECTINTO-1">
<refsect2info>
<date>2001-03-20</date>
</refsect2info>
<title>
Inputs
</title>
<para>
<variablelist>
<varlistentry>
<term>TEMPORARY</term>
<term>TEMP</term>
<listitem>
<para>
If specified, the table is created as a temporary table.
Refer to <xref linkend="sql-createtable" endterm="sql-createtable-title"> for details.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="PARAMETER">new_table</replaceable></term>
<listitem>
<para>
The name (optionally schema-qualified) of the table to be created.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
<para>
All other inputs are described in detail for
<xref linkend="sql-select" endterm="sql-select-title">.
</para>
</refsect2>
<refsect2 id="R2-SQL-SELECTINTO-2">
<refsect2info>
<date>2001-03-20</date>
</refsect2info>
<title>
Outputs
</title>
<para>
Refer to
<xref linkend="sql-createtable" endterm="sql-createtable-title">
and
<xref linkend="sql-select" endterm="sql-select-title">
for a summary of possible output messages.
</para>
</refsect2>
</refsynopsisdiv>
<refsect1 id="R1-SQL-SELECTINTO-1">
<refsect1info>
<date>2001-03-20</date>
</refsect1info>
<title>
Description
</title>
<para>
<command>SELECT INTO</command> creates a new table and fills it
with data computed by a query. The data is not returned to the
client, as it is with a normal <command>SELECT</command>. The new
table's columns have the names and data types associated with the
output columns of the <command>SELECT</command>.
<note>
<para>
<xref linkend="sql-createtableas" endterm="sql-createtableas-title">
is functionally equivalent to <command>SELECT INTO</command>.
<command>CREATE TABLE AS</command> is the recommended syntax, since
<command>SELECT INTO</command> is not standard. In fact, this form of
<command>SELECT INTO</command> is not available in <application>PL/pgSQL</application> or <xref linkend="app-ecpg">,
because they interpret the INTO clause differently.
</para>
</note>
</para>
</refsect1>
<refsect1 id="R1-SQL-SELECTINTO-2">
<title>
Compatibility
</title>
<para>
SQL92 uses <command>SELECT ... INTO</command> to represent selecting
values into scalar variables of a host program, rather than creating
a new table. This indeed is the usage found in <application>PL/pgSQL</application> and <xref linkend="app-ecpg">.
The <productname>PostgreSQL</productname> usage of <command>SELECT
INTO</command> to represent table creation is historical. It's best
to use <command>CREATE TABLE AS</command> for this purpose in new code.
(<command>CREATE TABLE AS</command> isn't standard either, but it's
less likely to cause confusion.)
</para>
</refsect1>
</refentry>
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