多发性表和查询

Question

如何加入这样的事情一起：

$query = ("SELECT * FROM profiles,follow 
      WHERE follow.friend ='$user' 
       AND follow.user !='$user' 
       AND profiles.user1 =follow.user 
      ORDER BY id DESC limit 20"); 

或

("SELECT * FROM profiles WHERE user1='$user'"); 

我需要查询，以显示两个不同的东西我怎么做。

感谢

汤姆。

Answer 1

使用UNION：

SELECT * 
FROM profiles, follow 
WHERE follow.friend ='$user' 
    AND follow.user !='$user' 
    AND profiles.user1 =follow.user 
    ORDER BY id DESC limit 20 
UNION 
SELECT * 
FROM profiles 
WHERE user1='$user' 

Answer 2

试试这个

$query = "SELECT * FROM profiles,follow WHERE follow.friend ='$user' and follow.user !='$user' and profiles.user1 =follow.user and profiles.user1='$user' order by id DESC limit 20"; 

Answer 3

这一个？

SELECT 
    * 
FROM 
    follows 
INNER JOIN 
    profiles 
    ON (profiles.user1 = follow.user) 
WHERE 
    follow.friend = '{$user}' 
    AND follow.user != '{$user}' 
    AND profiles.user1 = '{$user}' 
ORDER BY 
    profiles.id DESC 
LIMIT 20