MYSQL delete語句不支持別名的問題

有一個表的數據比較大,然後需要進行關聯刪除,刪除的時候發現如下SQL報錯:

 

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;
 

報錯如下:

 

Error Code: 1064

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'a WHERE EXISTS (SELECT 1 FROM test.test2 b WHERE a.recordID=b.smsInf' at line 1  www.aiwalls.com  

開始以為是exists的問題,於是更改成in再測試,也報同樣錯:

 

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;

 

原來是MYSQL的delete語句不支持別名!

 

將別名去掉就可以瞭,將上面兩個報錯的SQL更改成如下形式就可以瞭:

 

DELETE FROM test.test1 WHERE recordid IN (SELECT smsInfoID FROM test.test2 WHERE receiveTime <= "2011-10-09 00:00:00") LIMIT 1000;  www.aiwalls.com  

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 飛鴻無痕

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