1999-07-22 17:09:15 +02:00
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_table.sgml,v 1.9 2000/10/22 23:32:38 tgl Exp $
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1999-07-22 17:09:15 +02:00
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Postgres documentation
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1999-07-06 19:16:42 +02:00
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<refentry id="SQL-DROPTABLE">
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<refmeta>
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<refentrytitle id="SQL-DROPTABLE-TITLE">
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DROP TABLE
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</refentrytitle>
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<refmiscinfo>SQL - Language Statements</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>
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DROP TABLE
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</refname>
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<refpurpose>
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Removes existing tables from a database
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</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<refsynopsisdivinfo>
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<date>1999-07-20</date>
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</refsynopsisdivinfo>
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<synopsis>
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DROP TABLE <replaceable class="PARAMETER">name</replaceable> [, ...]
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</synopsis>
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<refsect2 id="R2-SQL-DROPTABLE-1">
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<refsect2info>
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<date>1998-09-22</date>
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</refsect2info>
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<title>
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Inputs
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</title>
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<para>
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<variablelist>
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<varlistentry>
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<term><replaceable class="PARAMETER">name</replaceable></term>
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<listitem>
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<para>
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The name of an existing table to drop.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect2>
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<refsect2 id="R2-SQL-DROPTABLE-2">
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<refsect2info>
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<date>1998-09-22</date>
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</refsect2info>
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<title>
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Outputs
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</title>
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<para>
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<variablelist>
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<varlistentry>
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<term><computeroutput>
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DROP
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</computeroutput></term>
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<listitem>
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<para>
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The message returned if the command completes successfully.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><computeroutput>
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ERROR: table "<replaceable class="parameter">name</replaceable>" does not exist
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</computeroutput></term>
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<listitem>
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<para>
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If the specified table does not exist in the database.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect2>
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</refsynopsisdiv>
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<refsect1 id="R1-SQL-DROPTABLE-1">
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<refsect1info>
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<date>1998-09-22</date>
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</refsect1info>
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<title>
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Description
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</title>
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<para>
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<command>DROP TABLE</command> removes tables from the database.
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Only its owner may destroy a table. A table
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may be emptied of rows, but not destroyed, by using <command>DELETE</command>.
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</para>
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<para>
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If a table being destroyed has secondary indexes on it,
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they will be removed first. The removal of just a
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secondary index will not affect the contents of the underlying table.
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</para>
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<refsect2 id="R2-SQL-DROPTABLE-3">
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<refsect2info>
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<date>1998-09-22</date>
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</refsect2info>
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<title>
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Notes
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</title>
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<para>
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Refer to <command>CREATE TABLE</command> and
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<command>ALTER TABLE</command> for information on
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how to create or modify tables.
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</para>
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</refsect2>
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</refsect1>
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<refsect1 id="R1-SQL-DROPTABLE-2">
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<title>
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Usage
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</title>
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<para>
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To destroy two tables, <literal>films</literal> and
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<literal>distributors</literal>:
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<programlisting>
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DROP TABLE films, distributors;
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</programlisting>
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</para>
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</refsect1>
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<refsect1 id="R1-SQL-DROPTABLE-3">
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<title>
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Compatibility
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</title>
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1999-07-06 19:16:42 +02:00
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<refsect2 id="R2-SQL-DROPTABLE-4">
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<refsect2info>
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<date>1998-09-22</date>
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</refsect2info>
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<title>
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SQL92
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</title>
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<para>
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SQL92 specifies some additional capabilities for DROP TABLE:
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</para>
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<synopsis>
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DROP TABLE <replaceable class="parameter">table</replaceable> { RESTRICT | CASCADE }
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</synopsis>
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<variablelist>
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<varlistentry>
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<term>RESTRICT</term>
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<listitem>
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<para>
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Ensures that only a table with no dependent views or
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integrity constraints can be destroyed.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>CASCADE</term>
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<listitem>
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<para>
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Any referencing views or integrity constraints
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will also be dropped.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<tip>
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<para>
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At present, to remove a referenced view you must drop
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it explicitly.
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</para>
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</tip>
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</refsect2>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:nil
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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sgml-parent-document:nil
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sgml-default-dtd-file:"../reference.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:"/usr/lib/sgml/catalog"
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sgml-local-ecat-files:nil
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End:
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