3 sql內連接表，現在如何計算其中的總行

Question

這裏是查詢，我有內聯加入了3個表，現在我正在計算結果中的所有行，即78通過執行php查詢我的管理員，我不想表的結果，我想JST 1行中wchich只寫了就是78，與我們在

SELECT count (*) FROM test_table 

做下面的3個內連接表

 SELECT 
mybb_users.uid, 
mybb_users.username, 
mybb_users.avatar, 
mybb_posts.fid, 
mybb_posts.uid, 
mybb_posts.dateline, 
mybb_posts.tid, 
mybb_posts.subject, 
mybb_forums.parentlist, 
mybb_forums.fid 
FROM mybb_forums 
    INNER JOIN mybb_posts ON mybb_forums.fid = mybb_posts.fid 
    INNER JOIN mybb_users ON mybb_posts.uid = mybb_users.uid 
    WHERE mybb_forums.parentlist LIKE '%58%' 
    GROUP BY mybb_posts.tid 
    ORDER BY mybb_posts.dateline DESC 

查詢現在如何計算它的總行數呢？

EDITED

SELECT count(mybb_users.uid) AS totalOfRows 
FROM (

SELECT mybb_users.uid, mybb_users.username, mybb_users.avatar, mybb_posts.fid, mybb_posts.uid AS uidPost, mybb_posts.dateline, mybb_posts.tid, mybb_posts.subject, mybb_forums.parentlist, mybb_forums.fid AS fidForum 
FROM mybb_forums 
INNER JOIN mybb_posts ON mybb_forums.fid = mybb_posts.fid 
INNER JOIN mybb_users ON mybb_posts.uid = mybb_users.uid 
WHERE mybb_forums.parentlist LIKE '%58%' 
GROUP BY mybb_posts.tid 
)T 

錯誤::＃1054 - 未知列在 '字段列表' mybb_users.uid「

Answer 1

好了，如果你不想要的結果，你爲什麼顯示這些字段？一個選擇返回一個表，所以申請數吧：

SELECT 
count(*) 
FROM mybb_forums 
    INNER JOIN mybb_posts ON mybb_forums.fid = mybb_posts.fid 
    INNER JOIN mybb_users ON mybb_posts.uid = mybb_users.uid 
    WHERE mybb_forums.parentlist LIKE '%58%' 
    GROUP BY mybb_posts.tid 

此外，你的帖子groupying，所以，不需要訂購

編輯： 我想查詢我已經貼應該工作，無論如何，如果不是的話，這絕對應該工作：

SELECT sum(Total) AS totalOfRows 
FROM ( 

SELECT 1 as Total 
FROM mybb_forums 
INNER JOIN mybb_posts ON mybb_forums.fid = mybb_posts.fid 
INNER JOIN mybb_users ON mybb_posts.uid = mybb_users.uid 
WHERE mybb_forums.parentlist LIKE '%58%' 
GROUP BY mybb_posts.tid 
)T