Relationele indeling in mysql zonder geaggregeerde functies?

Wat je nodig hebt, is de relationele indeling van eenvoudige codd.

select distinct p.team from player p 
where not exists
(select * from player p1 
where not exists
(select * from player p2 
where 
p.team=p2.team 
and 
p2.gid=p1.gid))