摘要: #1.创建临时表 CREATE TEMPORARY TABLE tmp_t select id from table where id not in (select max(id) from table group by mc,dz); #2.删除重复记录 delete from table whe 阅读全文
posted @ 2018-12-13 20:23 liw66 阅读(136) 评论(0) 推荐(0)