Question

I’m trying to write an SQL query for my program, but I just can’t figure out how. I don’t know enough SQL.

I’m trying to implement an online team system (for some website). I have two tables:

teams | teamId, eventId
teammembers | teamId, userId, status

Now, I need to: delete all records in teammembers where the eventId for the corresponding teamId is 1.

I’m trying:

delete from teammembers where teamId=teams.teamId and teams.eventId=1;

I’m not sure if this is really doing what I’m trying to do.

Is this query wrong, and if it is (which probably is), how can I write such a query?

Answer 1

You don’t specify your RDBMS so here it is in MySQL

DELETE teammembers FROM teammembers
JOIN teams on teammembers.teamId = teams.teamId
WHERE teams.eventId = 1