Name
   ALTER GROUP
   --    Add users to a group, remove users from a group
  
Synopsis
ALTER GROUP name ADD USER username [, ... ]
ALTER GROUP name DROP USER username [, ... ]
  
    Inputs
   
    
- name
- 	The name of the group to modify.
        
- username
-         Users which are to be added or removed from the group. The user
        names must exist.
        
    Outputs
   
    
- ALTER GROUP
- 	Message returned if the alteration was successful.
        
   Description
  
   ALTER GROUP is used to add or remove users from a
   group. Only database superusers can use this command.
   Adding a user to a group does not create the user. Similarly, removing
   a user from a group does not drop the user itself.
  
   Use CREATE GROUP
   to create a new group and DROP GROUP to remove a group.
  
   Usage
  
   Add users to a group:
ALTER GROUP staff ADD USER karl, john
   Remove a user from a group:
ALTER GROUP workers DROP USER beth
     Compatibility
  
    SQL92
   
    There is no ALTER GROUP statement in
    SQL92. The concept of roles is
    similar.