mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-07-28 16:45:31 +02:00
support both FOR UPDATE and FOR SHARE in one command, as well as both NOWAIT and normal WAIT behavior. The more general code is actually simpler and cleaner.
161 lines
5.4 KiB
Plaintext
161 lines
5.4 KiB
Plaintext
<!--
|
|
$PostgreSQL: pgsql/doc/src/sgml/ref/select_into.sgml,v 1.37 2006/04/30 18:30:38 tgl 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>define a new table from the results of a query</refpurpose>
|
|
</refnamediv>
|
|
|
|
<indexterm zone="sql-selectinto">
|
|
<primary>SELECT INTO</primary>
|
|
</indexterm>
|
|
|
|
<refsynopsisdiv>
|
|
<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 | SHARE } [ OF <replaceable class="parameter">table_name</replaceable> [, ...] ] [ NOWAIT ] [...] ]
|
|
</synopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<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>.
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Parameters</title>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><literal>TEMPORARY</literal> or <literal>TEMP</literal></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>
|
|
All other parameters are described in detail under <xref
|
|
linkend="sql-select" endterm="sql-select-title">.
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Notes</title>
|
|
|
|
<para>
|
|
<xref linkend="sql-createtableas"
|
|
endterm="sql-createtableas-title"> is functionally similar to
|
|
<command>SELECT INTO</command>. <command>CREATE TABLE AS</command>
|
|
is the recommended syntax, since this form of <command>SELECT
|
|
INTO</command> is not available in <application>ECPG</application>
|
|
or <application>PL/pgSQL</application>, because they interpret the
|
|
<literal>INTO</literal> clause differently. Furthermore,
|
|
<command>CREATE TABLE AS</command> offers a superset of the
|
|
functionality provided by <command>SELECT INTO</command>.
|
|
</para>
|
|
|
|
<para>
|
|
Prior to <productname>PostgreSQL</> 8.1, the table created by
|
|
<command>SELECT INTO</command> included OIDs by default. In
|
|
<productname>PostgreSQL</productname> 8.1, this is not the case
|
|
— to include OIDs in the new table, the <xref
|
|
linkend="guc-default-with-oids"> configuration variable must be
|
|
enabled. Alternatively, <command>CREATE TABLE AS</command> can be
|
|
used with the <literal>WITH OIDS</literal> clause.
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Examples</title>
|
|
|
|
<para>
|
|
Create a new table <literal>films_recent</literal> consisting of only
|
|
recent entries from the table <literal>films</literal>:
|
|
|
|
<programlisting>
|
|
SELECT * INTO films_recent FROM films WHERE date_prod >= '2002-01-01';
|
|
</programlisting>
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Compatibility</title>
|
|
|
|
<para>
|
|
The SQL standard 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>ECPG</application> (see <xref linkend="ecpg">) and
|
|
<application>PL/pgSQL</application> (see <xref linkend="plpgsql">).
|
|
The <productname>PostgreSQL</productname> usage of <command>SELECT
|
|
INTO</command> to represent table creation is historical. It is
|
|
best to use <command>CREATE TABLE AS</command> for this purpose in
|
|
new code.
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
|
|
<simplelist type="inline">
|
|
<member><xref linkend="sql-createtableas" endterm="sql-createtableas-title"></member>
|
|
</simplelist>
|
|
</refsect1>
|
|
</refentry>
|
|
|
|
<!-- Keep this comment at the end of the file
|
|
Local variables:
|
|
mode: sgml
|
|
sgml-omittag:nil
|
|
sgml-shorttag:t
|
|
sgml-minimize-attributes:nil
|
|
sgml-always-quote-attributes:t
|
|
sgml-indent-step:1
|
|
sgml-indent-data:t
|
|
sgml-parent-document:nil
|
|
sgml-default-dtd-file:"../reference.ced"
|
|
sgml-exposed-tags:nil
|
|
sgml-local-catalogs:"/usr/lib/sgml/catalog"
|
|
sgml-local-ecat-files:nil
|
|
End:
|
|
-->
|