分享整理的12条sql语句连同数据(二)
:where语句的 第一个条件过滤掉不满足c#的记录,再group by,就比较清晰)
select `S#` from SC where `C#` in (select `C#` from SC where `S#`=2)
group by `S#` having count(*)=(select count(*) from SC where `S#`=2);
作者 人在江湖