從當前用戶及其所有朋友獲取更新 - mysql查詢

Question

我正在構建一個類似Facebook的牆，並希望從當前用戶和所有朋友中檢索所有更新。

現在，我只是從用戶的朋友那裏得到更新。我如何包含用戶自己的更新？

SELECT M.msg_id, 
    M.uid_fk, 
    M.message, 
    M.created, 
    U.fname, 
    U.lname, 
    M.uploads 
FROM messages M INNER JOIN users_friends F ON F.friendID = M.uid_fk 

AND F.userID = " . $_SESSION['user_id'] . " 
AND F.status = 2 
      INNER JOIN users U ON U.userID = F.friendID 

      order by M.msg_id desc limit 10 

Answer 1

SELECT <columns> 
FROM (
    SELECT <columns> 
    FROM <friends criteria> 
    UNION 
    SELECT <columns> 
    FROM <current user criteria> 
) x 
order by msg_id desc 
limit 10