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<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_table.sgml,v 1.17 2002/07/14 22:47:56 tgl Exp $
PostgreSQL documentation
-->
<refentry id="SQL-DROPTABLE">
<refmeta>
<refentrytitle id="SQL-DROPTABLE-TITLE">DROP TABLE</refentrytitle>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>
DROP TABLE
</refname>
<refpurpose>
remove a table
</refpurpose>
</refnamediv>
<refsynopsisdiv>
<refsynopsisdivinfo>
<date>1999-07-20</date>
</refsynopsisdivinfo>
<synopsis>
DROP TABLE <replaceable class="PARAMETER">name</replaceable> [, ...] [ CASCADE | RESTRICT ]
</synopsis>
<refsect2 id="R2-SQL-DROPTABLE-1">
<refsect2info>
<date>1998-09-22</date>
</refsect2info>
<title>
Inputs
</title>
<para>
<variablelist>
<varlistentry>
<term><replaceable class="PARAMETER">name</replaceable></term>
<listitem>
<para>
The name (optionally schema-qualified) of an existing table to drop.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>CASCADE</term>
<listitem>
<para>
Automatically drop objects that depend on the table
(such as views).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RESTRICT</term>
<listitem>
<para>
Refuse to drop the table if there are any dependent objects.
This is the default.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>
<refsect2 id="R2-SQL-DROPTABLE-2">
<refsect2info>
<date>1998-09-22</date>
</refsect2info>
<title>
Outputs
</title>
<para>
<variablelist>
<varlistentry>
<term><computeroutput>
DROP TABLE
</computeroutput></term>
<listitem>
<para>
The message returned if the command completes successfully.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><computeroutput>
ERROR: table "<replaceable class="parameter">name</replaceable>" does not exist
</computeroutput></term>
<listitem>
<para>
If the specified table does not exist in the database.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>
</refsynopsisdiv>
<refsect1 id="R1-SQL-DROPTABLE-1">
<refsect1info>
<date>1998-09-22</date>
</refsect1info>
<title>
Description
</title>
<para>
<command>DROP TABLE</command> removes tables from the database.
Only its owner may destroy a table. A table may be emptied of rows, but not
destroyed, by using <command>DELETE</command>.
</para>
<para>
<command>DROP TABLE</command> always removes any indexes, rules,
triggers, and constraints that exist for the target table. However,
to drop a table that is referenced by a foreign-key constraint of another
table, CASCADE must be specified. (CASCADE will remove the foreign-key
constraint, not the other table itself.)
</para>
<refsect2 id="R2-SQL-DROPTABLE-3">
<refsect2info>
<date>1998-09-22</date>
</refsect2info>
<title>
Notes
</title>
<para>
Refer to <command>CREATE TABLE</command> and
<command>ALTER TABLE</command> for information on
how to create or modify tables.
</para>
</refsect2>
</refsect1>
<refsect1 id="R1-SQL-DROPTABLE-2">
<title>
Usage
</title>
<para>
To destroy two tables, <literal>films</literal> and
<literal>distributors</literal>:
<programlisting>
DROP TABLE films, distributors;
</programlisting>
</para>
</refsect1>
<refsect1 id="R1-SQL-DROPTABLE-3">
<title>
Compatibility
</title>
<refsect2 id="R2-SQL-DROPTABLE-4">
<title>
SQL92
</title>
<para>
</para>
</refsect2>
</refsect1>
</refentry>
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|
