SQL DELETE在PHPmyAdmin中堕落

Question

SQL DELETE在PHPmyAdmin中垮台。无法解决原因;是因为左外连接？

SELECT * 
    FROM `User` 
LEFT OUTER JOIN `freshersdata` ON `User`.`username`=`freshersdata`.`username` 
WHERE (`freshersdata`.`username` IS null) 
    AND (`User`.`Persistent`!=1) 

该SQL查询翻倒用（＃1064 - 你在你的SQL语法错误）消息，但用SELECT而不是删除工作perfecly，这是为什么？

Answer 1

您必须指定从哪个表要删除：

例如来自用户：

DELETE User.* 
    FROM User 
LEFT OUTER JOIN freshersdata ON User.username=freshersdata.username 
WHERE (freshersdata.username IS null) AND (User.Persistent!=1) 

Answer 2

DELETE FROM User 
LEFT OUTER JOIN 
    freshersdata ON User.username=freshersdata.username 
WHERE (freshersdata.username IS null) AND (User.Persistent!=1)