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       ALTER GROUP - change role name or membership


       ALTER GROUP groupname ADD USER username [, ... ]
       ALTER GROUP groupname DROP USER username [, ... ]

       ALTER GROUP groupname RENAME TO newname


       ALTER  GROUP  changes  the  attributes  of  a  user  group.  This is an
       obsolete command, though still accepted  for  backwards  compatibility,
       because groups (and users too) have been superseded by the more general
       concept of roles.

       The first two variants add users to a  group  or  remove  them  from  a
       group.  (Any role can play the part of either a ‘‘user’’ or a ‘‘group’’
       for  this  purpose.)  These  variants  are  effectively  equivalent  to
       granting  or revoking membership in the role named as the ‘‘group’’; so
       the preferred way to do this is  to  use  GRANT  [grant(7)]  or  REVOKE

       The  third  variant  changes  the  name  of  the group. This is exactly
       equivalent to renaming the role with ALTER ROLE [alter_role(7)].


              The name of the group (role) to modify.

              Users (roles) that are to be added to or removed from the group.
              The  users  must  already  exist; ALTER GROUP does not create or
              drop users.

              The new name of the group.


       Add users to a group:

       ALTER GROUP staff ADD USER karl, john;

       Remove a user from a group:

       ALTER GROUP workers DROP USER beth;


       There is no ALTER GROUP statement in the SQL standard.


       GRANT [grant(7)], REVOKE [revoke(7)], ALTER ROLE [alter_role(7)]