用SQL实现学籍管理系统相关的表操作（转载来的部分已修改）用mysql5.5做的

1、创建学生表、教师表、课程表、成绩表

1）创建学生表

CREATE TABLE STUDENT

(SNO VARCHAR(3) NOT NULL,

SNAME VARCHAR(4) NOT NULL,

SSEX VARCHAR(2) NOT NULL,

SBIRTHDAY DATETIME,

CLASS VARCHAR(5))

2）创建课程表

CREATE TABLE COURSE

(CNO VARCHAR(5) NOT NULL,

CNAME VARCHAR(10) NOT NULL,

TNO VARCHAR(10) NOT NULL)

3）创建成绩表

CREATE TABLE SCORE

(SNO VARCHAR(3) NOT NULL,

CNO VARCHAR(5) NOT NULL,

DEGREE NUMERIC(10, 1) NOT NULL)

4）创建教师表

CREATE TABLE TEACHER

(TNO VARCHAR(3) NOT NULL,

TNAME VARCHAR(4) NOT NULL, TSEX VARCHAR(2) NOT NULL,

TBIRTHDAY DATETIME NOT NULL, PROF VARCHAR(6),

DEPART VARCHAR(10) NOT NULL)

2、输入数据

1）输入数据到学生表

INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (108 ,'曾华' ,'男' ,1977-09-01,95033);

INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (105 ,'匡明' ,'男' ,1975-10-02,95031);

INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (107 ,'王丽' ,'女' ,1976-01-23,95033);

INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (101 ,'李军' ,'男' ,1976-02-20,95033);

INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (109 ,'王芳' ,'女' ,1975-02-10,95031);

INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (103 ,'陆君' ,'男' ,1974-06-03,95031);

GO

2）输入数据到课程表

INSERT INTO COURSE(CNO,CNAME,TNO)VALUES ('3-105' ,'计算机导论',825)

INSERT INTO COURSE(CNO,CNAME,TNO)VALUES ('3-245' ,'操作系统' ,804);

INSERT INTO COURSE(CNO,CNAME,TNO)VALUES ('6-166' ,'数据电路' ,856);

INSERT INTO COURSE(CNO,CNAME,TNO)VALUES ('9-888' ,'高等数学' ,100);

GO

3）输入数据到成绩表

INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (103,'3-245',86);

INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (105,'3-245',75);

INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (109,'3-245',68);

INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (103,'3-105',92);

INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (105,'3-105',88);

INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (109,'3-105',76);

INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (101,'3-105',64);

INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (107,'3-105',91);

INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (108,'3-105',78);

INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (101,'6-166',85);

INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (107,'6-106',79);

INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (108,'6-166',81);

GO

4）输入数据到教师

INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)

VALUES (804,'李诚','男','1958-12-02','副教授','计算机系');

INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)

VALUES (856,'张旭','男','1969-03-12','讲师','电子工程系');

INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)

VALUES (825,'王萍','女','1972-05-05','助教','计算机系');

INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)

VALUES (831,'刘冰','女','1977-08-14','助教','电子工程系');

相关操作

#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 in(85,86,88)
#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,degree desc
#9查询”95031“班的学生人数
select count(*) as 人数 from student where class='95031'
#10查询score表中的最高分的学生学号和课程号
select sno,cno from score where degree=(select max(degree) from score)
#11查询’3-105‘号课程的平均分
select avg(degree) as 平均分 from score where cno='3-105'
#12查询score表中至少有五名学生选修的并以3开头的课程的平均分
select cno as 课程号,avg(degree) as 平均分 from score
where cno like '3%'
group by cno
having count(*)>5
#13查询最低分大于70，最高分小于90的sno列
select sno from score
group by sno
having min(degree)>70 and max(degree)<90
#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,cname,degree from score,course
where course.cno=score.cno
#16查询所有学生的sname、cname和degree
select sname,cname,degree from student,course,score
where student.sno=score.sno and course.cno=score.cno
#17查询”95033“班所选课程的平均分
select cno,avg(degree) from score
group by cno
having cno in(select cno from score where sno in(select sno from student where class='95033'))
#18建立一个grade表，查询所有同学的sno,cno和rank列
create table grade(low numeric(3,0),upp numeric(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');

select sno,cno,rank from grade,score
where score.degree>low and score.degree #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
where sno in(select sno from score where degree>(select degree from score where sno='109' and cno='3-105')and cno='3-105')
#20、查询score中选学一门以上课程的同学中分数为非最高分成绩的记录。
SELECT * from score
where degree not in(select max(degree) from score group by cno )GROUP by sno HAVING count(*)>=2
#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>(select degree from score where sno='109' and cno='3-105')
#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 in(select tno from course where cno in(select cno from score group by cno having count(*)>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 cno from score
where degree>85
group by cno
#27、查询出“计算机系“教师所教课程的成绩表。
select score.* from teacher,course,score
where score.cno=course.cno and teacher.tno=course.tno
and teacher.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 depart='计算机系' and prof not in(select prof from teacher where depart='电子工程系')
or depart='电子工程系' and prof not in(select prof from teacher where depart='计算机系')
#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 cno,sno,degree from score
where cno='3-105' and degree>(select min(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 cno,sno,degree from score
where cno='3-105' and degree>(select max(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 a
where degree<(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,course
where teacher.tno=course.tno
#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 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,2013-year(sbirthday) from student
#39、查询Student表中最大和最小的Sbirthday日期值。
select max(sbirthday),min(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 class desc
#41、查询“男”教师及其所上的课程。
select cno,cname from course
where tno in (select tno from teacher where tsex='男')
#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')
and 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')