【转载】【SQL练习】经典SQL练习题

【转载】【SQL练习】经典SQL练习题

出处 https://blog.csdn.net/mrbcy/article/details/68965271

准备数据 建表语句

CREATE TABLE students

(sno VARCHAR(3) NOT NULL,

sname VARCHAR(4) NOT NULL,

ssex VARCHAR(2) NOT NULL,

sbirthday DATETIME,

class VARCHAR(5))

CREATE TABLE courses

(cno VARCHAR(5) NOT NULL,

cname VARCHAR(10) NOT NULL,

tno VARCHAR(10) NOT NULL)

CREATE TABLE scores

(sno VARCHAR(3) NOT NULL,

cno VARCHAR(5) NOT NULL,

degree NUMERIC(10, 1) NOT NULL) 

CREATE TABLE teachers

(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)

插入数据

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

INSERT INTO TEACHERS(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART) VALUES (804,'李诚','男','1958-12-02','副教授','计算机系');

INSERT INTO TEACHERS(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART) VALUES (856,'张旭','男','1969-03-12','讲师','电子工程系');

INSERT INTO TEACHERS(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART) VALUES (825,'王萍','女','1972-05-05','助教','计算机系');

INSERT INTO TEACHERS(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART) VALUES (831,'刘冰','女','1977-08-14','助教','电子工程系');

题目

1、 查询Student表中的所有记录的Sname、Ssex和Class列。



2、 查询教师所有的单位即不重复的Depart列。



3、 查询Student表的所有记录。



4、 查询Score表中成绩在60到80之间的所有记录。



5、 查询Score表中成绩为85，86或88的记录。



6、 查询Student表中“95031”班或性别为“女”的同学记录。



7、 以Class降序查询Student表的所有记录。



8、 以Cno升序、Degree降序查询Score表的所有记录。



9、 查询“95031”班的学生人数。



10、查询Score表中的最高分的学生学号和课程号。



11、查询‘3-105’号课程的平均分。



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。



13、查询最低分大于70，最高分小于90的Sno列。



14、查询所有学生的Sname、Cno和Degree列。



15、查询所有学生的Sno、Cname和Degree列。



16、查询所有学生的Sname、Cname和Degree列。



17、查询“95033”班所选课程的平均分。



18、假设使用如下命令建立了一个grade表：

create table grade(low   number(3,0),upp   number(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’);

commit;

现查询所有同学的Sno、Cno和rank列。



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。



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。



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。



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。



23、查询“张旭“教师任课的学生成绩。



24、查询选修某课程的同学人数多于5人的教师姓名。



25、查询95033班和95031班全体学生的记录。



26、查询存在有85分以上成绩的课程Cno.

27、查询出“计算机系“教师所教课程的成绩表。



28、查询“计算机系”与“电子工程系“不同职称的教师的Tname和Prof。



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。



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.

31、查询所有教师和同学的name、sex和birthday.

32、查询所有“女”教师和“女”同学的name、sex和birthday.

33、查询成绩比该课程平均成绩低的同学的成绩表。



34、查询所有任课教师的Tname和Depart.

35  查询所有未讲课的教师的Tname和Depart.

36、查询至少有2名男生的班号。



37、查询Student表中不姓“王”的同学记录。



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。



40、以班号和年龄从大到小的顺序查询Student表中的全部记录。



41、查询“男”教师及其所上的课程。



42、查询最高分同学的Sno、Cno和Degree列。



43、查询和“李军”同性别的所有同学的Sname.

44、查询和“李军”同性别并同班的同学Sname.

45、查询所有选修“计算机导论”课程的“男”同学的成绩表

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 Teachers;

3.查询Student表的所有记录。

SELECT *

FROM Students;

4.查询Score表中成绩在60到80之间的所有记录。

SELECT *

FROM Scores

WHERE Degree BETWEEN 60 AND 80;

5.查询Score表中成绩为85，86或88的记录。

SELECT *

FROM Scores

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 Students

WHERE Class='95031' OR Ssex='女';

7.以Class降序查询Student表的所有记录。

SELECT *

FROM Students

ORDER BY Class DESC;

8.以Cno升序、Degree降序查询Score表的所有记录。

SELECT *

FROM Scores

ORDER BY Cno,Degree DESC;

9.查询“95031”班的学生人数。

SELECT COUNT(1) AS StuNum

FROM Students

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 Scores

ORDER BY Degree DESC

LIMIT 1;

11.查询‘3-105’号课程的平均分。

SELECT AVG(Degree)

FROM Scores

WHERE Cno='3-105';

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 Cno,AVG(Degree)

FROM Scores

WHERE Cno LIKE '3%'

GROUP BY Cno

HAVING COUNT(Sno) >= 5;

13.查询最低分大于70，最高分小于90的Sno列。

SELECT Sno

FROM Scores

GROUP BY Sno

HAVING MAX(Degree)<90 AND MIN(Degree)>70;

14.查询所有学生的Sname、Cno和Degree列。

SELECT Sname,Cno,Degree

FROM Students INNER JOIN Scores

ON(Students.Sno=Scores.Sno)

ORDER BY Sname;

15.查询所有学生的Sno、Cname和Degree列。

SELECT Sno,Cname,Degree

FROM Scores INNER JOIN Courses

ON(Scores.Cno=Courses.Cno)

ORDER BY Sno;

16.查询所有学生的Sname、Cname和Degree列。

SELECT Sname,Cname,Degree

FROM Students INNER JOIN Scores

ON(Students.Sno=Scores.Sno) INNER JOIN Courses

ON(Scores.Cno=Courses.Cno)

ORDER BY Sname;

17.查询“95033”班所选课程的平均分。

SELECT Cname,AVG(Degree)

FROM Students INNER JOIN Scores

ON(Students.Sno=Scores.Sno) INNER JOIN Courses

ON(Scores.Cno=Courses.Cno)

WHERE Class='95033'

GROUP BY Courses.Cno

ORDER BY Cname;

18.假设使用如下命令建立了一个grade表：

CREATE TABLE grade(low TINYINT,upp TINYINT,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。

SELECT Sno,Cno,rank

FROM Scores INNER JOIN grade

ON(Scores.Degree>=grade.low AND Scores.Degree<=grade.upp)

ORDER BY Sno;

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 s1.Sno,s1.Degree

FROM Scores AS s1 INNER JOIN Scores AS s2

ON(s1.Cno=s2.Cno AND s1.Degree>s2.Degree)

WHERE s1.Cno='3-105' AND s2.Sno='109'

ORDER BY s1.Sno;

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 Scores

GROUP BY Sno

HAVING COUNT(cno)>1 AND Degree!=MAX(Degree);

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 s1.Sno,s1.Degree

FROM Scores AS s1 INNER JOIN Scores AS s2

ON(s1.Cno=s2.Cno AND s1.Degree>s2.Degree)

WHERE s1.Cno='3-105' AND s2.Sno='109'

ORDER BY s1.Sno;

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 s1.Sno,s1.Sname,s1.Sbirthday

FROM Students AS s1 INNER JOIN Students AS s2

ON(YEAR(s1.Sbirthday)=YEAR(s2.Sbirthday))

WHERE s2.Sno='108';

23.查询“张旭“教师任课的学生成绩。

SELECT Sno,Degree

FROM Scores INNER JOIN Courses

ON(Scores.Cno=Courses.Cno) INNER JOIN Teachers

ON(Courses.Tno=Teachers.Tno)

WHERE Teachers.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 DISTINCT Tname

FROM Scores INNER JOIN Courses

ON(Scores.Cno=Courses.Cno) INNER JOIN Teachers

ON(Courses.Tno=Teachers.Tno)

WHERE Courses.Cno IN(SELECT Cno FROM Scores GROUP BY(Cno) HAVING COUNT(Sno)>5);

25.查询95033班和95031班全体学生的记录。

SELECT *

FROM Students

WHERE Class IN ('95033','95031')

ORDER BY Class;

26.查询存在有85分以上成绩的课程Cno.

SELECT DISTINCT Cno

FROM Scores

WHERE Degree>85;

27.查询出“计算机系“教师所教课程的成绩表。

SELECT Tname,Cname,SName,Degree

FROM Teachers INNER JOIN Courses

ON(Teachers.Tno=Courses.Tno) INNER JOIN Scores

ON(Courses.Cno=Scores.Cno) INNER JOIN Students

ON(Scores.Sno=Students.Sno)

WHERE Teachers.Depart='计算机系'

ORDER BY Tname,Cname,Degree DESC;

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 Teachers

WHERE Depart='计算机系' AND Prof NOT IN(

    SELECT DISTINCT Prof

    FROM Teachers

    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任意选修编号为“3-245”的同学的成绩的Cno、Sno和Degree,并按Degree从高到低次序排序。

SELECT Cno,Sno,Degree

FROM Scores

WHERE Cno='3-105' AND Degree > ANY(

    SELECT Degree

    FROM Scores

    WHERE Cno='3-245')

ORDER BY Degree DESC;

30.查询选修编号为“3-105”且成绩高于所有选修编号为“3-245”课程的同学的Cno、Sno和Degree.

SELECT Cno,Sno,Degree

FROM Scores

WHERE Cno='3-105' AND Degree > ALL(

    SELECT Degree

    FROM Scores

    WHERE Cno='3-245')

ORDER BY Degree DESC;

31.查询所有教师和同学的name、sex和birthday.

SELECT Sname,Ssex,Sbirthday

FROM Students

UNION

SELECT Tname,Tsex,Tbirthday

FROM Teachers;

32.查询所有“女”教师和“女”同学的name、sex和birthday.

SELECT Sname,Ssex,Sbirthday

FROM Students

WHERE Ssex='女'

UNION

SELECT Tname,Tsex,Tbirthday

FROM Teachers

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 s1.*

FROM Scores AS s1 INNER JOIN (

    SELECT Cno,AVG(Degree) AS aDegree

    FROM Scores

    GROUP BY Cno) s2

ON(s1.Cno=s2.Cno AND s1.Degree<s2.aDegree);

34.查询所有任课教师的Tname和Depart.

SELECT Tname,Depart

FROM Teachers

WHERE Tno IN(

    SELECT Tno

    FROM Courses

);

35.查询所有未讲课的教师的Tname和Depart.

SELECT Tname,Depart

FROM Teachers

WHERE Tno NOT IN(

    SELECT Tno

    FROM Courses

);

36.查询至少有2名男生的班号。

SELECT Class,COUNT(1) AS boyCount

FROM Students

WHERE Ssex='男'

GROUP BY Class

HAVING boyCount>=2;

37.查询Student表中不姓“王”的同学记录。

SELECT *

FROM Students

WHERE Sname NOT LIKE '王%';

38.查询Student表中每个学生的姓名和年龄。

SELECT Sname,YEAR(NOW())-YEAR(Sbirthday) AS Sage

FROM Students;

39.查询Student表中最大和最小的Sbirthday日期值。

SELECT MIN(Sbirthday),MAX(Sbirthday)

FROM Students;

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 Students

ORDER BY Class DESC,Sbirthday ASC;

41.查询“男”教师及其所上的课程。

SELECT Teachers.Tname,Courses.Cname

FROM Teachers INNER JOIN Courses

ON(Teachers.Tno=Courses.Tno)

WHERE Teachers.Tsex='男';

42.查询最高分同学的Sno、Cno和Degree列。

SELECT *

FROM Scores

GROUP BY Cno

HAVING Degree=Max(Degree);

43.查询和“李军”同性别的所有同学的Sname.

SELECT s1.Sname

FROM Students AS s1 INNER JOIN Students AS s2

ON(s1.Ssex=s2.Ssex)

WHERE s2.Sname='李军';

44.查询和“李军”同性别并同班的同学Sname.

SELECT s1.Sname

FROM Students AS s1 INNER JOIN Students AS s2

ON(s1.Ssex=s2.Ssex AND s1.Class=s2.Class)

WHERE s2.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 Scores

WHERE Sno IN (

    SELECT Sno

    FROM Students

    WHERE Ssex='男') AND

    Cno IN (

    SELECT Cno

    FROM Courses

    WHERE Cname='计算机导论');