Question

I have a table called team

I need to select a coach who also might be a player on the team….

The attributes for the table are
(teamID, playerID, role)

I’m able to select all coaches or all players but not sure how to select one which is both…..

select *
from isPlaying h
where h.role= 'Coach';

Thanks

Answer 1

select playerID
from isPlaying coach join isPlaying player on
   coach.playerID = player.playerID
where
   coach.role = 'Coach' and
   player.role = 'Player'