Given the following schema:
User id Group id Membership group_id user_id
How would I select the group(s) of which the same two users are a member?
What I have now:
SELECT "Membership"."group_id" FROM "Membership" WHERE "Membership"."user_id" IN (1, 2) GROUP BY "Membership"."group_id" HAVING COUNT("Membership"."group_id") >= 2
Which seems to work, (it only retuns the group ids of which both users are a member), but looks rather confusing.
Is there a better way to express this query?
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