Oracle數據庫作業-6 29、查詢選修編號為“3-105“課程且成績至少高於選修編號為“3-245”的同學的Cno、Sno和Degree,並按Degree從高到低次序排序。 select tname,prof from teacher where depart = '計算機系' and prof not in ( select prof from teacher where depart 。

29、查詢選修編號為“3-105“課程且成績至少高於選修編號為“3-245”的同學的Cno、Sno和Degree,並按Degree從高到低次序排序。

select tname,prof from teacher where depart = '計算機系' and prof not in  (

select prof from teacher where depart = '電子工程系'）

 

30、查詢選修編號為“3-105”且成績高於選修編號為“3-245”課程的同學的Cno、Sno和Degree.

select * from score a where  cno = '3-105' and a.degree>(

select b.degree from score b where cno = '3-245'and a.sno=b.sno)