mysql两个查询

Question

我有一个评论系统; 我有一个查询

SELECT ShoutID,Message, User, Date, ShoutImageThumb, ShoutImageBig,UserID, 
     Email, FullName, UserImageThumb, Admin FROM shoutbox LEFT JOIN users ON 
     users.Email = shoutbox.User ORDER BY ShoutID DESC LIMIT 10 

，虽然其经历的循环 在页面上我运行的循环另一个查询得到评论该消息

SELECT users.UserID, users.Email, users.FullName, shoutboxcomments.ShoutID, 
     shoutboxcomments.`Comment`, shoutboxcomments.`Date`, 
     shoutboxcomments.`User`, shoutboxcomments.CommentID FROM shoutboxcomments 
     LEFT JOIN users ON users.Email = shoutboxcomments.User 
     WHERE ShoutID = '.$ShoutID.' ORDER BY CommentID ASC 

是否有可能加入这些查询或我可以如何简化它，因为即时通讯建设在PHP使用mvc架构

Answer 1

而不是每个帖子运行一个查询，使用IN一次获取多个帖子的评论。

SELECT users.UserID, users.Email, ... 
FROM shoutboxcomments 
LEFT JOIN users 
ON users.Email = shoutboxcomments.User 
WHERE ShoutID IN (1, 4, 15, 22) 
ORDER BY CommentID