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' ,'操作系统' ,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');