摘要: 示例代码如下:create table tmp as select min(主键) as col1 from 去重表名 GROUP BY 去重字段;delete from 去重表名 where 主键 not in (select col1 from tmp); drop table tmp; 阅读全文
posted @ 2015-11-04 17:45 jack_ou 阅读(2144) 评论(0) 推荐(0)