`id` int(11) NOT NULL auto_increment, # group id
`parent_id` int(11) default NULL, # parent group id
`org_id` int(11) default NULL, # organization id (id of top group)
`id` int(11) NOT NULL auto_increment, # group id
`parent_id` int(11) default NULL, # parent group id
`org_id` int(11) default NULL, # organization id (id of top group)