将语句转换为连接

Question

请帮我用连接写

(SELECT isvisibleforclients FROM user_assigned_packages WHERE (user_assigned_packages.UserID = 
(SELECT ParentUserID FROM users WHERE users.UserID = UserID)))

Answer 1

SELECT isvisibleforclients FROM user_assigned_packages uap
JOIN users us ON
uap.UserID = us.ParentUserID
AND us.UserID = UserID

假设您的代码中传递了 UserID 。

Answer 2

试试这个...

SELECT 
isvisibleforclients 
FROM 
user_assigned_packages a 
inner join users b on a.UserID =b.ParentUserID and  b.UserID = userID