mysql concat筛选查询重复数据
摘要:
SELECT c from (SELECT *,concat(field0,field1)as c from tableName) tt GROUP BY c HAVING count(c) > 1 阅读全文
posted @ 2019-04-17 04:41 王了了 阅读(583) 评论(0) 推荐(0)
posted @ 2019-04-17 04:41 王了了 阅读(583) 评论(0) 推荐(0)