|PostgreSQL 8.0.26 Documentation|
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As in Unix, groups are a way of logically grouping users to ease management of privileges: privileges can be granted to, or revoked from, a group as a whole. To create a group, use the CREATE GROUP SQL command:
CREATE GROUP name;
To add users to or remove users from an existing group, use ALTER GROUP:
ALTER GROUP name ADD USER uname1, ... ; ALTER GROUP name DROP USER uname1, ... ;
To destroy a group, use DROP GROUP:
DROP GROUP name;
This only drops the group, not its member users.
To determine the set of existing groups, examine the pg_group system catalog, for example
SELECT groname FROM pg_group;
The psql program's \dg meta-command is also useful for listing the existing groups.
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