MySQL或问题

Question

有没有一种方法可以在下面的mysql代码中使用OR或类似的东西。

INNER JOIN users_friends ON users.user_id = users_friends.friend_id OR users_friends.user_id 

Answer 1

INNER JOIN users_friends 
    ON users.user_id IN (users_friends.friend_id, users_friends.user_id) 

Answer 2

尝试：

INNER JOIN users_friends ON (users.user_id = users_friends.friend_id OR users_friends.user_id) 

Answer 3

你不是说......

INNER JOIN users_friends ON (users.user_id = users_friends.friend_id OR 
          users.user_id = users_friends.user_id) 

Answer 4

Used Many types of this query 
INNER JOIN users_friends as U ON (users.user_id = U.friend_id OR U.user_id) 

Answer 5

INNER JOIN users_friends ON（users.user_id = users_friends.friend_id | | users.user_id = users_friends.user_id）