I create a login with role database creater but it can not detach a database. Why? While executing sp_detach_db I got the error "User 'xxx' does not have permission to run DBCC DETACHDB.". So what kind of permission should I grant to this login? Actualy what I want to do is let it can just attach and detach a specific database, no other operations allowed. Is it possible to do that? Thanks.