Oracle数据库作业-6 查询成绩比该课程平均成绩低的同学的成绩表

33、 查询成绩比该课程平均成绩低的同学的成绩表。

select * from score a where a.degree between 0 and(

select avg(degree) from score b   where a.cno=b.cno )

34、 查询所有任课教师的Tname和Depart.

select tname,depart from teacher where tno in(

select tno from course )

35 、 查询所有未讲课的教师的Tname和Depart.

select tname,depart from teacher where tno not in(

select tno from course )

36、查询至少有2名男生的班号。

select sclass from student where ssex = '男' group by sclass having count(sno)>=2

37、查询Student表中不姓“王”的同学记录。

select * from student where sname not like '王%'

38、查询Student表中每个学生的姓名和年龄。

39、查询Student表中最大和最小的Sbirthday日期值。

select max(t.sbirthday),min(t.sbirthday) from student t

40、以班号和年龄从大到小的顺序查询Student表中的全部记录。

select * from student order by sclass desc , sbirthday asc

41、查询“男”教师及其所上的课程。

select tname , cname  from teacher t ,course c  where tsex = '男'and t.tno=c.tno

42、查询最高分同学的Sno、Cno和Degree列。

select * from score where degree =(

select max(degree) from score)

43、查询和“李军”同性别的所有同学的Sname.

select sname from student where ssex = (

select ssex from student where sname ='李军'）

44、查询和“李军”同性别并同班的同学Sname.

select sname from student where ssex = (

select ssex from student where sname ='李军'）

and sclass =(

select sclass from student where sname ='李军'）

45、查询所有选修“计算机导论”课程的“男”同学的成绩表。

select * from score where sno in (

select sno from student where ssex = '男')

and cno in (

select cno from course where cname = '计算机导论')