返回來自MySQL的最新消息？

我需要在以下查詢中添加一個連接，它將把messages_message表加入到messages_threads表中，並從messages_messages中的最近一行返回'body'和'time'字段，其中messages_message.threadid = messages_threads.id。返回來自MySQL的最新消息？

對不起，這是如此令人困惑，我不知道怎麼說呢！這是我目前的查詢 - 除了'body'和'time'字段之外，它正確地提取所有內容。

SELECT 
    messages_threads.id AS threadid, messages_threads.name AS recipientsname, 
    senderid, username AS sendername, pictures.url AS senderpicture 
FROM 
    messages_recipients 
    JOIN messages_threads 
     ON messages_threads.id = messages_recipients.threadid 
    JOIN users 
     ON users.id = messages_threads.senderid 
    JOIN pictures 
     ON messages_threads.senderid = pictures.userid 
     AND pictures.profile = 1 
WHERE messages_recipients.userid = $userid

來源

2011-04-25 Walker

您可以添加messages_message表的子查詢這將返回1個一行每一個線程。例如：

SELECT 
    messages_threads.id AS threadid, messages_threads.name AS recipientsname, 
    senderid, username AS sendername, pictures.url AS senderpicture 
FROM 
    messages_recipients 
    JOIN messages_threads ON messages_threads.id = messages_recipients.threadid 
    JOIN users ON users.id = messages_threads.senderid 
    JOIN pictures ON messages_threads.senderid = pictures.userid AND pictures.profile = 1 
    JOIN (SELECT threadid, MAX(id) AS postid FROM messages_message GROUP BY threadid) t ON message_threads.id = t.threadid 
    JOIN messages_message ON t.threadid = messages_message.threadid AND t.postid = messages_message.id 
WHERE messages_recipients.userid = $userid

來源

2011-04-25 11:25:51 judda

我想你會需要通過集團的身體和時間也... 或u能更多的指定查詢..

來源

2011-04-25 11:08:05

嗨，我還沒有添加連接到messages_messages，但我試圖決定如何。你是否提出了一個小組的子查詢？ – Walker 2011-04-25 11:25:09

如果您知道在message_thread表字段中計數或檢查所需的話，那麼需要。否則有很多簡單的解決方案。 – 2011-04-25 11:29:42

Juddas答案工作，你有一個更簡單的解決方案？感謝您的幫助！ – Walker 2011-04-25 11:37:24

返回來自MySQL的最新消息？

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