SQL join on multiple columns in same tables

Question

I have 2 subqueries, but I\'m having trouble joining columns together from the same tables. I tried:

SELECT * FROM

(SELECT userid, listid 
FROM user_views_         


        

Answer 1

Join like this:

ON a.userid = b.sourceid AND a.listid = b.destinationid;

Answer 2

You want to join on condition 1 AND condition 2, so simply use the AND keyword as below

ON a.userid = b.sourceid AND a.listid = b.destinationid;