Question

I’ve got two tables, one with games and one with participants.

A game can have multiple participants. Now I need to search if a game is already inserted. I made a query with an inner join.

SELECT game.gameId
FROM game 
INNER JOIN participants 
WHERE game.gameId = participants.gameId 
AND participants.name = 'Team1' 
AND participants.name = 'Team2'

This isn’t working the way I expected, is there a way to check if there is a match between teams 1 and 2 in one query?

Thanks!

edit

tablelayout:

**game**
PK gameId
date

**participants**
PK id
FK gameId
name
type //home or visiting

Answer 1

You’re not trying to relate game to participants, but participants to itself.

select 
   p1.gameId 
from 
   participants as p1, participants as p2 
where
   p1.name = 'Team1' and p2.name='Team2' and p1.gameId = p2.gameId