作者:梦幻小螳螂 | 来源:互联网 | 2023-08-31 15:25
gaodaima.com有一个表的数据比较大,然后需要进行关联删除,删除的时候发现如下SQL报错:DELETEFROMtest.test1aWHEREEXISTS(SELECT1F
gaodaima.com
有一个表的数据比较大,然后需要进行关联删除,删除的时候发现如下SQL报错: DELETE FROM test.test1 a WHERE EXISTS (SELECT 1 FROM test.test2 b WHERE a.recordID=b.smsInfoID AND b.receiveTime <="2011-10-09 00:00:00" ) limit 1000;
报错如下: Error Code: 1064You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near &#039;a WHERE EXISTS (SELECT 1 FROM test.test2 b WHERE a.recordID=b.smsInf&#039; at line 1 开始以为是exists的问题,于是更改成in再测试,也报同样错: DELETE FROM test.test1 a WHERE a.recordid IN (SELECT b.smsInfoID FROM test.test2 b WHERE b.receiveTime <= "2011-10-09 00:00:00") LIMIT 1000; 原来是MYSQL的delete语句不支持别名! 将别名去掉就可以了,将上面两个报错的SQL更改成如下形式就可以了: DELETE FROM test.test1 WHERE recordid IN (SELECT smsInfoID FROM test.test2 WHERE receiveTime <= "2011-10-09 00:00:00") LIMIT本文来源gaodaimacom搞#代%码@网- 1000; DELETE FROM test.test1 WHERE EXISTS (SELECT 1 FROM test.test2 WHERE test1.recordID=test2.smsInfoID AND test2.receiveTime <= "2011-10-09 00:00:00") LIMIT 1000; 作者 飞鸿无痕 gaodaima.com