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<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/create_group.sgml,v 1.15 2005/01/04 00:39:53 tgl Exp $
PostgreSQL documentation
-->
<refentry id="SQL-CREATEGROUP">
<refmeta>
<refentrytitle id="sql-creategroup-title">CREATE GROUP</refentrytitle>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>CREATE GROUP</refname>
<refpurpose>define a new user group</refpurpose>
</refnamediv>
<indexterm zone="sql-creategroup">
<primary>CREATE GROUP</primary>
</indexterm>
<refsynopsisdiv>
<synopsis>
CREATE GROUP <replaceable class="PARAMETER">name</replaceable> [ [ WITH ] <replaceable class="PARAMETER">option</replaceable> [ ... ] ]
where <replaceable class="PARAMETER">option</replaceable> can be:
SYSID <replaceable class="PARAMETER">gid</replaceable>
| USER <replaceable class="PARAMETER">username</replaceable> [, ...]
</synopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>CREATE GROUP</command> will create a new group of users.
You must be a database superuser to use this command.
</para>
<para>
Note that both users and groups are defined at the database cluster
level, and so are valid in all databases in the cluster.
</para>
<para>
Use <xref linkend="SQL-ALTERGROUP" endterm="SQL-ALTERGROUP-title">
to change a group's membership, and <xref linkend="SQL-DROPGROUP"
endterm="SQL-DROPGROUP-title"> to remove a group.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><replaceable class="parameter">name</replaceable></term>
<listitem>
<para>
The name of the group.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">gid</replaceable></term>
<listitem>
<para>
The <literal>SYSID</literal> clause can be used to choose
the <productname>PostgreSQL</productname> group ID of the new
group.
This is normally not necessary, but may
be useful if you need to recreate a group referenced in the
permissions of some object.
</para>
<para>
If this is not specified, the highest assigned group ID plus one
(with a minimum of 100) will be used as default.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">username</replaceable></term>
<listitem>
<para>
A list of users to include in the group. The users must already exist.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Create an empty group:
<programlisting>
CREATE GROUP staff;
</programlisting>
</para>
<para>
Create a group with members:
<programlisting>
CREATE GROUP marketing WITH USER jonathan, david;
</programlisting>
</para>
</refsect1>
<refsect1>
<title>Compatibility</title>
<para>
There is no <command>CREATE GROUP</command> statement in the SQL
standard. Roles are similar in concept to groups.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-altergroup" endterm="sql-altergroup-title"></member>
<member><xref linkend="sql-dropgroup" endterm="sql-dropgroup-title"></member>
</simplelist>
</refsect1>
</refentry>
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