MySQL或问题

Question

有没有办法可以在下面的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

你的意思是......

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）