Mysql 删除重复的记录

首先，表A不能删除表A中查出的ID对应的记录，如下：

delete from `test`.duplicateTest where id not in (
select max(id) as id from `test`.duplicateTest as b group by name) ;

这样会报错：ERROR 1093错误。解决办法，创建临时表：

delete from `test`.duplicateTest where id not in (
select id from (select max(id) as id from `test`.duplicateTest as b group by name) as temps);