Question

a team table which containd a team ID and a team name and then 2 further tables that contain data from a quiz and another with data from a questionnaire.

I need to get a list of team IDs that have completed BOTH the quiz (so have some quiz data) AND the questionnaire (so have some questionnaire data) but I can’t see how to join the 3 tables to get the list of ids I need.

Any pointers greatly received

Answer 1

As you said in upper comment..

I actually want team IDs that are in either of the data tables. How
would that amend the query? – Dave

Try this, This is what I understood with your words..

select teamID,teamName from team where teamID in (select teamID from quiz) or teamID in (select teamID from questionnaire);