MySQL -删除选择

Question

我试图删除所有与在我的MyBB数据库中使用两次以上的ip相关的帐户。下面的代码用于"选择"这些用户。

SELECT * FROM `mybb_forumusers` WHERE `regip` IN (
    SELECT `regip` FROM `mybb_forumusers`
    GROUP BY `regip`
    HAVING COUNT( `regip` ) > 2
)

但是，我不能成功地删除所有这些用户而不出现错误。我尝试了以下(和变化):

DELETE FROM `mybb_forumusers` WHERE `uid` IN (
    SELECT `uid` FROM `mybb_forumusers` WHERE `regip`IN (
        SELECT `regip` FROM `mybb_forumusers`
        GROUP BY `regip`
        HAVING COUNT( `regip` ) > 2
    )
)

Answer 1

我建议使用join:

DELETE fu
    FROM `mybb_forumusers` fu JOIN 
         (SELECT `regip`
          FROM `mybb_forumusers`
          GROUP BY `regip`
          HAVING COUNT( `regip` ) > 2
         ) fu2
         ON fu2.regip = fu.regip;