如何获取用户 ID 并检查该用户是否有好友。
SELECT *
FROM wall
inner join users on users.id=wall.Owner and request
inner join users user.id=request.id
ORDER BY wall.id_c DESC
最佳答案
如果我理解正确的话你可以试试这个。
SELECT *
FROM wall
inner join users on users.id=wall.Owner
join request on user.id=request.id
ORDER BY wall.id_c DESC
关于mysql - 我怎样才能连接三个表,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57541095/