MySQL 仅从单表中删除记录

Question

我有两个相互关联的表，我只想从一个表中删除记录。表结构如下

Table : Users
userunique, active, unSubscribed

Table : userBilling
userunique, billCreatedDate,billstatus

我想删除那些不再活跃的用户的账单，条件如下。

billcreateddate < 2011-12-30 
billstatus=2 //pending

active='0'
unSubscribed<'2011-12-30'

我已经写了一个查询，但它不是我所期望的。我只想从 userBilling 表而不是 Users 表中删除记录

select * from userBilling ubill, Users user
WHERE ubilll.userUnique=user.userUnique 
AND ubill.billCreatedDate<'2011-12-30'
AND ubill.billstatus = '2'  
AND ((user.active = '0') AND (user.unsubscribed>'2011-01-01') 
AND user.unSubscribed<'2011-12-30')) 

但我猜上面的查询包括两个表的结果。请推荐!

谢谢，

Answer 1

DELETE  a
FROM    userBilling a
        INNER JOIN users b
            ON a.auserUnique = b.userUnique
WHERE   billcreateddate < 2011-12-30 OR
        billstatus = 2 OR
        active = 0 OR
        unSubscribed < '2011-12-30'

如果您希望所有条件都为true，请将OR 更改为AND。