2017-3-18 SQL server 数据库 45道题

use data02161212
create table student
(Sno nvarchar(3) primary key,
Sname nvarchar(8) not null,
Ssex nvarchar(2) not null,
Sbirthday datetime,
Class nvarchar(5),
)
-- drop table student

create table course
(Cno nvarchar(5)primary key,
Cname nvarchar(10) not null,
Tno nvarchar(3) not null,
)
--drop table course
select * from course
create table teacher
(Tno nvarchar(3) primary key,
Tname nvarchar(4)not null,
Tsex nvarchar(2)not null,
Tbirthday datetime,
Prof nvarchar(6),
Depart nvarchar(10) not null,
)
create table score
(Sno nvarchar(3) not null ,
Cno nvarchar(5) not null,
Degree Decimal(4,1),
)
insert into student values( 108,'曾华','男','1977-09-01',95033 )
insert into student values( 105,'匡明','男','1975-10-02',95031)
insert into student values( 107,'王丽','女','1976-01-23',95033)
insert into student values( 101,'李军','男','1976-02-20',95033 )
insert into student values(109,'王芳','女','1975-02-10',95031)
insert into student values(103,'陆君','男','1974-06-03',95031)
select * from student
insert into course values('3-105','计算机导论',825)
insert into course values('3-245','操作系统',804)
insert into course values('6-166','数字电路',856)
insert into course values('9-888','高等数学',831)
select * from course
insert into score values(103,'3-245',86)
insert into score values(105,'3-245',75)
insert into score values(109,'3-245',68)
insert into score values(103,'3-105',92)
insert into score values(105,'3-105',88)
insert into score values(109,'3-105',76)
insert into score values(101,'3-105',64)
insert into score values(107,'3-105',91)
insert into score values(108,'3-105',78)
insert into score values(101,'6-166',85)
insert into score values(107,'6-166',79)
insert into score values(108,'6-166',81)
select * from score
insert into teacher values(804,'李诚','男','1958-12-02','副教授','计算机系')
insert into teacher values(856,'张旭','男','1969-03-12','讲师','电子工程系')
insert into teacher values(825,'王萍','女','1972-05-05','助教','计算机系')
insert into teacher values(831,'刘冰','女','1977-08-14','助教','电子工程系')
select * from teacher
select * from score
select * from course
select * from student

-- 1、 查询Student表中的所有记录的Sname、Ssex和Class列。
select Sname,Ssex,Class from student
--2、 查询教师所有的单位即不重复的Depart列。
select distinct Depart from teacher
--3、 查询Student表的所有记录。
select * from student
--4、 查询Score表中成绩在60到80之间的所有记录。
select * from score where Degree>=60 and Degree<=80
--5、 查询Score表中成绩为85，86或88的记录。
select * from score where Degree=85 or Degree=86 or Degree=88
--6、 查询Student表中“95031”班或性别为“女”的同学记录。
select * from student where class="95031" or Ssex='女'
--7、 以Class降序查询Student表的所有记录。
select * from student order by class desc
--8、 以Cno升序、Degree降序查询Score表的所有记录。
select * from score order by Cno asc , Degree desc
--9、 查询“95031”班的学生人数。
select count(Class) from student where Class='95031'
--10、?查询Score表中的最高分的学生学号和课程号。（子查询或者排序）
select Sno,Cno from score where Degree=(select MAX(Degree)from score)
--11、 查询每门课的平均成绩。
select Cno,avg(Degree) from score group by Cno
--12、查询Score表中至少有5名学生选修的并以3开头的课程的平均分数。
select AVG(Degree) ,cno from score group by cno having Cno=(select Cno from score group by Cno having COUNT(Cno)>=5 and Cno like '3%')

--13、查询分数大于70，小于90的Sno列。
select Sno from score where Degree<90 and Degree>70
--14、查询所有学生的Sname、Cno和Degree列。
select Sname,Cno,Degree from student,score where student.Sno= score.Sno
--15、查询所有学生的Sno、Cname和Degree列。
select Sno,Degree,(select Cname from course where course.Cno=score.Cno) from score
--16、查询所有学生的Sname、Cname和Degree列。
select Sname,Cname,Degree from student ,course,score where score.Cno=course.Cno and score.Sno=student.Sno
--17、?查询“95033”班学生的平均分。
select AVG(Degree),Class from score,student where score.Sno=student.Sno group by Class having class="95033"
--18、 假设使用如下命令建立了一个grade表：
/*create table grade(low int(3),upp int(3),rank char(1))
insert into grade values(90,100,’A’)
insert into grade values(80,89,’B’)
insert into grade values(70,79,’C’)
insert into grade values(60,69,’D’)
insert into grade values(0,59,’E’)
现查询所有同学的Sno、Cno和rank列。*/
create table grade
(low int,
upp int,
rank char(1),
)
insert into grade values(90,100,'A')
insert into grade values(80,89,'B')
insert into grade values(70,79,'C')
insert into grade values(60,69,'D')
insert into grade values(0,59,'E')
select * from grade
select Sno,Cno,rank from score,grade where Degree between low and upp
--19、? 查询选修“3-105”课程的成绩高于“109”号同学成绩的所有同学的记录。
select * from student,score where student.Sno=score.Sno and student.Sno in (select score.Sno where Degree>all(select Degree from score where Sno=109))and score.Cno ='3-105'
--20、查询score中选学多门课程的同学中分数为非最高分成绩的记录。
select * from score where Sno in(select Sno from score group by Sno having Count(Cno)>1) and Degree!=(select MAX(Degree)from score)
--21、 查询成绩高于学号为“109”、课程号为“3-105”的成绩的所有记录。
select * from score where Cno='3-105'and Degree > all (select Degree from score where Sno=109 )
--22、查询和学号为108的同学同年出生的所有学生的Sno、Sname和Sbirthday列。
select Sno,Sname,Sbirthday from student where YEAR (Sbirthday)=(select YEAR(Sbirthday) from student where Sno=108)
--23、查询“张旭“教师任课的学生成绩。
select * from score where Cno=(select Cno from course where Tno=(select Tno from teacher where Tname='张旭'))
--24、查询选修某课程的同学人数多于5人的教师姓名。
select Tname from teacher where Tno=(select Tno from course where Cno=(select Cno from score group by Cno having COUNT(Cno)>5
))
--25、查询95033班和95031班全体学生的记录。
select * from student where class="95033" or class="95031"
--26、? 查询存在有85分以上成绩的课程Cno.
select distinct Cno from score where Degree>85

--27、查询出“计算机系“教师所教课程的成绩表。
select * from score where Cno in (Select Cno from course where Tno in (select Tno from teacher where Depart='计算机系'))
--28、查询“计算机系”与“电子工程系“不同职称的教师的Tname和Prof。
select Tname,Prof from teacher where Prof not in (select Prof from teacher where Depart='计算机系'and Prof in(select Prof from teacher where Depart='电子工程系'))

--29、查询选修编号为“3-105“课程且成绩至少高于选修编号为“3-245”的同学的Cno、Sno和Degree,并按Degree从高到低次序排序。
select * from score where Cno='3-105' and Degree>any(select Degree from score where Cno='3-245')order by Degree desc

--30、查询选修编号为“3-105”且成绩高于选修编号为“3-245”课程的同学的Cno、Sno和Degree.
select * from score where Cno='3-105' and Degree>all(select Degree from score where Cno='3-245')

--31、?查询所有教师和同学的name、sex和birthday.
select Sname,Ssex,Sbirthday from student union select Tname,Tsex,Tbirthday from teacher
--32、查询所有“女”教师和“女”同学的name、sex和birthday.
select Sname,Ssex,Sbirthday from student where Ssex='女' union select Tname,Tsex,Tbirthday from teacher where Tsex='女'
--33、?查询成绩比该课程平均成绩低的同学的成绩表。
select * from score where Degree< any(select AVG(Degree) from score group by Cno)
--34、 查询所有任课教师的Tname和Depart.
select distinct Tname,Depart from teacher,score,course where teacher.Tno=course.Tno and course.Cno=score.Cno
-- 子查询方式34题：select Tname,Depart from teacher where Tno not ( select Tno from course where teacher.Tno=course.Tno and course.Tno in (select Tno from course where Cno in (select Cno from score where course.Cno=score.Cno)))

--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 where teacher.Tno=course.Tno and course.Tno in (select Tno from course where Cno in (select Cno from score where course.Cno=score.Cno)))

--36、查询至少有2名男生的班号。
select Class from student where Ssex='男' group by Class having COUNT(*)>=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
select Sname,year(GETDATE())-year(Sbirthday) from student
--39、查询Student表中最大和最小的Sbirthday日期值。
select max(CONVERT(DATE,Sbirthday )),min(CONVERT(DATE,Sbirthday))from student
--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 Sbirthday asc,Class desc
--41、查询“男”教师及其所上的课程。
select Tname,Cname from teacher,course where teacher.Tno=course.Tno and Tsex='男'and Cname in( select Cname from course where Tno in(select Tno from teacher))
--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 Class=(select Class 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')