Question

Two tables: MEMBER, GROUP.

I want to get name and email from MEMBER table,
and I want get the number of GROUPS a member is registered in.

GROUP has a memberId as FK. So memberId = 1 could have many groupID.

I want a single SQL query to gather info on all the members and how many groups they’re in.

Answer 1

I’m assuming the primary key of MEMBER is memberId. Try this

SELECT m.name, m.email, count(g.memberId )
FROM `MEMBER` m 
LEFT JOIN `GROUP` g ON g.memberId = m.memberId
GROUP BY m.memberId