MySQL的加入，而不是子查询

Question

嘿家伙，我想是这样的：

DELETE FROM ClientsFlags 
WHERE clientId = (SELECT id 
        FROM Client 
        WHERE emailRegistrationToken = 3) 
AND flagId = 42; 

但随着联接，而不是子查询。我对联接不太好，所以请帮助我。

Answer 1

这里是一个连接的版本，

DELETE a 
FROM ClientsFlags a 
     INNER JOIN Client b 
      ON a.clientId = b.id 
WHERE b.emailRegistrationToken = 3 AND    
     a.flagId = 42; 

Answer 2

你应该尝试这样的事：

DELETE C FROM ClientsFlags AS CF 
JOIN Client AS C ON C.Id=CF.clientId 
WHERE email=3 and flagId=42 

Answer 3

试试这个

Delete C From ClientFlags cf, Client c where cf.lientId=c.Id and email=3 and flagId=42;