PHP/MySQL Latest photos friends

Question

Photos: id, uid, date;

Friends: uid1, uid2, date, status;

I want show latest photos for friends of user. How do I do?

Answer 1

This will do it:

SELECT p.id
FROM Photos AS p, Friends AS f
WHERE p.uid = f.uid2 AND f.uid1 = ${userX.id}
ORDER BY p.date DESC
LIMIT 1;

Answer 2

SELECT id FROM photos WHERE uid IN (SELECT uid2 FROM friends WHERE uid1 = {$uid1} ORDER BY date DESC LIMIT 1);

I supposed that UID1 is the User and UID2 is the friend, this will retrieve all the IDs