标签:条件 col 筛选 nbsp group by person 查询 com http
select email from person group by email having count(email)>1
加入having语句,在分组中加入判断条件 count(email) >1,不满足这一条件的分组将不会被筛选出来。
标签:条件 col 筛选 nbsp group by person 查询 com http
原文地址:https://www.cnblogs.com/chxyshaodiao/p/12461434.html