带子查询的MySQL删除会产生语法错误

Question

在MySQL中，我有一个包含2个字段的表（＆＃39; ertek＆＃39;）： ＆＃39; id＆＃39;：int，autoincrement ＆＃39; mert＆＃39;：int

我想要删除值为＆＃39; mert＆＃39;的行。如果我按id ASC订购表，则低于上一行。

我的查询：

DELETE FROM ertek as t WHERE EXISTS (SELECT * FROM ertek AS t2 WHERE t2.id=t.id-1 AND t2.mert>t.mert)

我收到此错误： 1064 - 您的SQL语法出错;检查与您的MySQL服务器版本相对应的手册，以获得正确的语法，以便在附近使用＃as WHERE EXISTS（SELECT * FROM ertek AS t2 WHERE t2.id =（t.id）-1 AND t2.mert＆gt; t＆＃39; at line 1

请帮忙。

Answer 1

尝试不使用已删除的表名的别名

DELETE FROM ertek D
WHERE EXISTS 
(SELECT * FROM ertek AS t2 WHERE t2.id=D.id-1 AND t2.mert>D.mert)

或

  DELETE d1 FROM ertek d1 JOIN ertek d2 
  ON d2.id= (d1.id-1) AND d1.mert< d2.mert;