发布网友
发布时间:2024-10-23 08:21
共2个回答
热心网友
时间:2024-11-10 04:06
您好,您这样:
--1
select Sname,Sage from Student where Sage<(select Sage from Student where Sno='某一学生') and Sdept='数学系'
--2
select Sname from Student where Sno in (select Sno from SC)
--3
select Sname from Student where Sno in (select Sno from SC group by Sno having count(*)=(select count(*) from Course ))
热心网友
时间:2024-11-10 04:05
其实很简单,我建议你一个一个问,不然回答也很烦的