注意：在插入數據的時候，需要將zahowei改成中文，原數據是中文的，因為最近這個詞不能過審，只能用拼音代替了，可能是那個人出了啥事吧，審核不通過就挺莫名其妙的

現在有一教學管理系統，具體的關系模式如下：
? ? ? ?Student (no, name, sex, birthday, class)
? ? ? ?Teacher (no, name, sex, birthday, prof, depart)
? ? ? ?Course (cno, cname, tno)
? ? ? ?Score (no, cno, degree)
其中表中包含如下數據：
Course表：

Score表：

Student表：

Teacher表：

首先創建教學管理系統數據庫：

use mastercreate database Teach_manage on primary ( name='Teach_mange', filename='D:\sqldata\Teach_mange.mdf', size=4, maxsize=30, filegrowth=10% ) log on ( name='mange_log', filename='D:\sqldata\mange_log.ldf', size=3, maxsize=20, filegrowth=10% )

DDL

1.寫出上述表的建表語句

命令：

create table Student(no int,name varchar(14),sex varchar(2),birthday date,class int); create table Teacher(no int,name varchar(14),sex varchar(2),birthday date,prof varchar(10),depart varchar(10)); create table Course(cno varchar(8),cname varchar(14),tno int); create table Score(no int,cno varchar(8),degree int);

DML

2.給出相應的INSERT語句來完成題中給出數據的插入

命令：

insert into Student values(5001,'李勇','男','1987-7-22',95001); insert into Student values(5002,'劉晨','女','1987-11-15',95002); insert into Student values(5003,'王敏','女','1987-10-5',95001); insert into Student values(5004,'李好尚','男','1987-9-25',95003); insert into Student values(5005,'李軍','男','1987-7-17',95004); insert into Student values(5006,'范新位','女','1987-6-18',95005); insert into Student values(5007,'張霞東','女','1987-8-29',95006); insert into Student values(5008,'zhaowei','男','1987-6-15',95007); insert into Student values(5009,'錢民將','女','1987-6-23',95008); insert into Student values(5010,'孫儷','女','1987-9-24',95002); insert into Student values(108,'趙里','男','1987-6-15',95007); insert into Student values(109,'丘處機','男','1987-6-23',95008); insert into Student values(107,'楊康','男','1987-9-24',95001);insert into Teacher values(1,'李衛','男','1957-11-5','教授','電子工程系'); insert into Teacher values(2,'劉備','男','1967-10-9','副教授','math'); insert into Teacher values(3,'關羽','男','1977-9-20','講師','sc'); insert into Teacher values(4,'李修','男','1957-6-25','教授','elec'); insert into Teacher values(5,'諸葛亮','男','1977-6-15','教授','計算機系'); insert into Teacher values(6,'殷素素','女','1967-1-5','副教授','sc'); insert into Teacher values(7,'周芷若','女','1947-2-23','教授','sc'); insert into Teacher values(8,'趙云','男','1980-6-13','副教授','計算機系'); insert into Teacher values(9,'張敏','女','1985-5-5','助教','sc'); insert into Teacher values(10,'黃蓉','女','1967-3-22','副教授','sc'); insert into Teacher values(11,'張三','男','1967-3-22','副教授','sc');insert into Course values('3-101','數據庫',1); insert into Course values('5-102','數學',3); insert into Course values('3-103','信息系統',4); insert into Course values('3-104','操作系統',6); insert into Course values('3-105','數據結構',4); insert into Course values('3-106','數據處理',5); insert into Course values('4-107','pascal語言',5); insert into Course values('4-108','C++',7); insert into Course values('4-109','java',8); insert into Course values('3-245','數據挖掘',10); insert into Course values('3-111','軟件工程',11);insert into Score values(5001,'3-105',69); insert into Score values(5001,'5-102',55); insert into Score values(5003,'4-108',85); insert into Score values(5004,'3-105',77); insert into Score values(5005,'3-245',100); insert into Score values(5006,'3-105',53); insert into Score values(5003,'4-109',45); insert into Score values(5008,'3-105',98); insert into Score values(5004,'4-109',68); insert into Score values(5010,'3-105',88); insert into Score values(5003,'3-105',98); insert into Score values(5005,'4-109',68); insert into Score values(5002,'3-105',88); insert into Score values(107,'3-105',98); insert into Score values(108,'4-109',68); insert into Score values(109,'3-105',88); insert into Score values(109,'4-109',80); insert into Score values(107,'3-111',88); insert into Score values(5003,'3-111',80);

單表查詢

3.以class降序輸出student的所有記錄（student表全部屬性）

select *from Student order by class DESC

4.列出教師所在的單位depart（不重復）

select distinct depart from Teacher

5.列出student表中所有記錄的name、sex和class列

select name,sex,class from Student

6.輸出student中不姓王的同學的姓名

select name from Student where name <> '王%'

7.輸出成績為85或86或88或在60-80之間的記錄（no,cno,degree）

select *from Score where degree=85 or degree=86 or degree between 60 and 80

8.輸出班級為95001或性別為‘女’ 的同學（student表全部屬性）

select *from Student where class=95001 or sex='女'

9.以cno升序、degree降序輸出score的所有記錄（score表全部屬性）

select *from Score order by cno , degree DESC

10.輸出男生人數及這些男生分布在多少個班級中

select COUNT(class),COUNT(distinct class) from Student where sex='男'

11.列出存在有85分以上成績的課程編號

select distinct cno from Score where degree>85

12.輸出95001班級的學生人數

select COUNT(class) from Student where class=95001

13.輸出‘3-105’號課程的平均分

select AVG(degree) from Score where cno='3-105'

14.輸出student中最大和最小的birthday日期值

select MAX(birthday),MIN(birthday) from Student

15.顯示95001和95004班全體學生的全部個人信息（不包括選課）。（student表全部屬性）

select *from Student where class=95001 or class=95004

聚合查詢

16.輸出至少有5個同學選修的并以3開頭的課程的課程號，課程平均分，課程最高分，課程最低分
命令：

select cno,avg(degree),MAX(degree),MIN(degree) from Score where cno like'3-%%%' group by cno having COUNT(no)>=5

17.輸出所選修課程中最低分大于70分且最高分小于90分的學生學號及學生姓名
命令：

select Student.no,name from Student join Score on Student.no=Score.no group by Student.no,Student.name having min(Score.degree)>70 and max(Score.degree)<90

18.顯示所教課程選修人數多于5人的教師姓名
命令：

select Teacher.name from Teacher,Course,Score where Teacher.no=Course.tno and Course.cno=Score.cno group by Teacher.name having count(Score.cno)>5

19.輸出’95001’班級所選課程的課程號和平均分
命令：

select Score.cno,AVG(degree) from Score,Student where Student.no=Score.no and class='95001' group by Score.cno

20.輸出至少有兩名男同學的班級編號
命令：

select class from Student where sex='男' group by class having COUNT(class)>=2

多表查詢

21.列出與108號同學同年出生的所有學生的學號、姓名和生日
命令：

select no,name,birthday from Student where datename(YEAR,birthday)=(select datename(YEAR,birthday) from Student where no='108')

22.列出存在有85分以上成績的課程名稱
命令：

select distinct cname from Course join Score on Course.cno=Score.cno where degree>85

23.列出“計算機系”教師所教課程的成績表（課程編號，課程名，學生名，成績）
命令：

select Course.cno,cname,Student.name,degree from Student,Score,Course,Teacher where Teacher.no=Course.tno and Score.cno=Course.cno and Student.no=Score.no and depart='計算機系'

24.列出所有可能的“計算機系”與“電子工程系”不同職稱的教師配對信息，要求輸出每個老師的姓名（name）和（職稱）
命令：

select x.name,x.prof,y.name,y.prof from (select name,prof,depart from teacher where depart='計算機系' or depart ='電子工程系') as x join (select name,prof,depart from teacher where depart='計算機系' or depart='電子工程系') as y on not x.prof=y.prof and not x.depart=y.depart

25.列出所有處于不同班級中，但具有相同生日的學生，要求輸出每個學生的學號和姓名。（提示：使用datediff函數，具體用法可以參考：
命令：

select table1.no,table1.name,table2.no,table2.name from (select no,name,class,birthday from Student)as table1 join (select no,name,class,birthday from Student) as table2 on table1.birthday=table2.birthday and not table1.class=table2.class

26.顯示‘張三’教師任課的學生姓名，課程名，成績

select Student.name,cname,degree from Teacher,Student,Course,Score where Teacher.no=Course.tno and Score.cno=Course.cno and Student.no=Score.no and Teacher.name='張三'

27.列出所講課已被選修的教師的姓名和系別

select distinct name,depart from teacher,course,score where teacher.no=course.tno and course.cno=score.cno

28.輸出所有學生的name、no和degree。（degree為空的不輸出和為空的輸出兩種情況）

select name,Student.no,degree from Student left join Score on Student.no=Score.noselect name,Student.no,degree from Student inner join Score on Student.no=Score.no

29.列出所有任課教師的name和depart。（從課程選修和任課兩個角度考慮）

select distinct name,depart from Teacher,Score,Course where Teacher .no=Course.tno and Course.cno=Score.cnoselect distinct name,depart from Teacher inner join Course on Teacher.no=Course.tno

30.輸出男教師所上課程名稱

select cname from Teacher join Course on Teacher.no=Course.tno where sex='男'

31.輸出與“李軍”同性別的所有同學的name

select name from Student where sex=(select sex from Student where name='李軍')

32.輸出選修“數據結構”課程的男同學的成績

select degree from Course,Student,Score where Course.cno=Score.cno and Student.no=Score.no and sex='男' and cname='數據結構'

33.列出選修編號為‘3-105’課程并且該門課程成績比課程 ‘3-111’的最高分要高的cno,no和degree

select Score.cno,Score.no,Score.degree from Score,(select degree from Score where cno='3-111') as a where Score.cno='3-105' group by Score.cno,Score.no,Score.degree having Score.degree>MAX(a.degree)

子查詢

34.輸出score中成績最高的學號和課程號

select no,cno from Score where degree=(select max(degree) from Score)

35.輸出選修3-105課程，其成績高于109號同學在此課程所得成績的所有同學的學號，姓名

select Student.no,Student.name from Student join Score on Student.no=Score.no where cno='3-105' and degree>(select degree from Score where Score.no='109')

')

36.列出成績比該課程平均成績低的同學的學號，成績和該門課的平均成績

select no,degree,a.avg_degree from score,(select cno,avg(degree)as avg_degree from score group by cno)as a(cno,avg_degree) where score.cno=a.cno and score.degree<a.avg_degree

37.列出沒有實際授課的教師的姓名和系別

select name,depart from teacher where name not in(select name from teacher join course on teacher.no=course.tno join score on score.cno=course.cno)

38.列出選修了編號為‘3-105’課程且其成績高于‘4-109’課程最高成績的同學的 課程編號，學號和成績

select cno,no,degree from score where cno='3-105' and degree>(select max(degree) from score where cno='4-109')

39.列出符合下述條件的所有可能的同學配對（sno1,sname1,sno2,sname2,difference）。其中要求學號為sno1的sname1同學的所學課程的平均分大于學號為sno2的sname2同學的所學課程平均分，兩個同學的課程平均分的差值difference為（sno1同學平均分-sno2同學平均分）

select a.no, a.name, b.no, b.name, c.avgdegree - d.avgdegree difference from Student as a, Student as b, (select no, avg(degree) as avgdegree from Score group by no) as c, (select no, avg(degree) avgdegree from Score group by no) as d where a.no = c.no and b.no = d.no and c.avgdegree > d.avgdegree

總結

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