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<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_table.sgml,v 1.12 2001/12/08 03:24:36 thomas 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> [, ...]
</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 of an existing table to drop.
</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
</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>
If a table being destroyed has secondary indexes on it,
they will be removed first. The removal of just a
secondary index will not affect the contents of the underlying table.
</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">
<refsect2info>
<date>1998-09-22</date>
</refsect2info>
<title>
SQL92
</title>
<para>
SQL92 specifies some additional capabilities for DROP TABLE:
</para>
<synopsis>
DROP TABLE <replaceable class="parameter">table</replaceable> { RESTRICT | CASCADE }
</synopsis>
<variablelist>
<varlistentry>
<term>RESTRICT</term>
<listitem>
<para>
Ensures that only a table with no dependent views or
integrity constraints can be destroyed.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>CASCADE</term>
<listitem>
<para>
Any referencing views or integrity constraints
will also be dropped.
</para>
</listitem>
</varlistentry>
</variablelist>
<tip>
<para>
At present, to remove a referenced view you must drop
it explicitly.
</para>
</tip>
</refsect2>
</refsect1>
</refentry>
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