use [Xk-kk]
go
select *
from achievement
go
use [Xk-kk]
go
select *
from Class join Student
on class.ClassNo=Student.ClassNo
join StuCou
on Student.StuNo=stucou.StuNo
join Course
on StuCou.CouNo=Course.CouNo
join achievement
on StuCou.StuNo=achievement.StuNO
where class.ClassName='15计算机(3+2)'
go
来自 “ ITPUB博客 ” ,链接:https://blog.itpub.net/1347/viewspace-2800834/ ,如需转载,请注明出处,否则将追究法律责任。