joining the same table twice on different columns

Question

I\'ve got a user table and a complaint table.

The complaint table has the following structure:

[opened_by]   [         


        

Answer 1

SELECT user1.username AS opened_by_username, complaint.complaint_text, user2.username AS closed_by_username
FROM user AS user1, complaint, user as user2
WHERE user1.user_id = complaint.opened_by
AND user2.user_id = complaint.closed_by

Join it again using an alias (thats what the user as user2 stuff is about)