编程题
1.create table Student
(Sno char(8) not null unique,
Sname char(20) ,
Ssex char(2),
Sage smallint,
Sdept char(2)
)
2.select * from Student
where Sdept='计算机系'
order by Sno Desc
3.select Student.Sno,Sname,Ssex
from Student join SC on Student.Sno=SC.Sno
join Course on Course.Cno=SC.Cno
where Grade>60 and Ccredit=5
4.不太会写~~呵呵抱歉哦