sql练习题
This commit is contained in:
hanlin
GitHub
parent
cc82b238c0
commit
0c1849351c
432
notes/sql经典练习题.sql
Normal file
432
notes/sql经典练习题.sql
Normal file
|
|
@ -0,0 +1,432 @@
|
|||
use fuxi;
|
||||
|
||||
CREATE TABLE STUDENT
|
||||
(
|
||||
SNO VARCHAR(3) NOT NULL,
|
||||
SNAME VARCHAR(4) NOT NULL,
|
||||
SSEX VARCHAR(2) NOT NULL,
|
||||
SBIRTHDAY DATETIME,
|
||||
CLASS VARCHAR(5)
|
||||
);
|
||||
|
||||
CREATE TABLE COURSE
|
||||
(
|
||||
CNO VARCHAR(5) NOT NULL,
|
||||
CNAME VARCHAR(10) NOT NULL,
|
||||
TNO VARCHAR(10) NOT NULL
|
||||
);
|
||||
|
||||
CREATE TABLE SCORE
|
||||
(
|
||||
SNO VARCHAR(3) NOT NULL,
|
||||
CNO VARCHAR(5) NOT NULL,
|
||||
DEGREE NUMERIC(10, 1) NOT NULL
|
||||
);
|
||||
|
||||
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
|
||||
);
|
||||
|
||||
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);
|
||||
|
||||
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);
|
||||
|
||||
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 (101, '6-166', 85);
|
||||
INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (107, '6-106', 79);
|
||||
INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (108, '3-105', 78);
|
||||
INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (108, '6-166', 81);
|
||||
|
||||
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');
|
||||
|
||||
-- 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 TEACHER1;
|
||||
|
||||
-- 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(*)
|
||||
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)
|
||||
from SCORE
|
||||
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
|
||||
avg(DEGREE),
|
||||
CNO
|
||||
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
|
||||
SCORE.SNO,
|
||||
CNO,
|
||||
DEGREE
|
||||
from STUDENT, SCORE
|
||||
where STUDENT.SNO = SCORE.SNO;
|
||||
|
||||
-- 16、查询所有学生的Sname、Cname和Degree列。
|
||||
SELECT
|
||||
A.SNAME,
|
||||
B.CNAME,
|
||||
C.DEGREE
|
||||
FROM STUDENT A
|
||||
JOIN (COURSE B, SCORE C)
|
||||
ON A.SNO = C.SNO AND B.CNO = C.CNO;
|
||||
|
||||
-- 17、查询“95033”班所选课程的平均分。
|
||||
select avg(DEGREE)
|
||||
from SCORE
|
||||
where sno in (select SNO
|
||||
from STUDENT
|
||||
where CLASS = '95033');
|
||||
|
||||
-- 18、假设使用如下命令建立了一个grade表：
|
||||
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');
|
||||
-- 现查询所有同学的Sno、Cno和rank列。
|
||||
SELECT
|
||||
A.SNO,
|
||||
A.CNO,
|
||||
B.RANK
|
||||
FROM SCORE A, grade B
|
||||
WHERE A.DEGREE BETWEEN B.LOW AND B.UPP
|
||||
ORDER BY RANK;
|
||||
|
||||
-- 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 SCORE
|
||||
where CNO = '3-105' and DEGREE > ALL (
|
||||
select DEGREE
|
||||
from SCORE
|
||||
where SNO = '109'
|
||||
);
|
||||
|
||||
set @@global.sql_mode = 'STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';
|
||||
set sql_mode = 'STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';
|
||||
|
||||
-- 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 < (select MAX(DEGREE)
|
||||
from SCORE)
|
||||
group by SNO
|
||||
having count(*) > 1;
|
||||
|
||||
-- 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。
|
||||
-- 同19
|
||||
|
||||
-- 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
|
||||
inner join TEACHER on COURSE.TNO = TEACHER.TNO and 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(SNO) > 5)
|
||||
);
|
||||
|
||||
-- 25、查询95033班和95031班全体学生的记录。
|
||||
select *
|
||||
from STUDENT
|
||||
where CLASS in ('95033', '95031');
|
||||
|
||||
-- 26、查询存在有85分以上成绩的课程Cno.
|
||||
select cno
|
||||
from SCORE
|
||||
group by CNO
|
||||
having MAX(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 TEACHER, COURSE
|
||||
where DEPART = '计算机系' and COURSE.TNO = TEACHER.TNO);
|
||||
|
||||
-- 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'
|
||||
);
|
||||
|
||||
-- 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 > 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 DEGREE > ALL (
|
||||
SELECT DEGREE
|
||||
FROM SCORE
|
||||
WHERE CNO = '3-245'
|
||||
)
|
||||
ORDER by DEGREE desc;
|
||||
|
||||
-- 31、查询所有教师和同学的name、sex和birthday.
|
||||
select
|
||||
TNAME name,
|
||||
TSEX sex,
|
||||
TBIRTHDAY birthday
|
||||
from TEACHER
|
||||
union
|
||||
select
|
||||
sname name,
|
||||
SSEX sex,
|
||||
SBIRTHDAY birthday
|
||||
from STUDENT;
|
||||
|
||||
-- 32、查询所有“女”教师和“女”同学的name、sex和birthday.
|
||||
select
|
||||
TNAME name,
|
||||
TSEX sex,
|
||||
TBIRTHDAY birthday
|
||||
from TEACHER
|
||||
where TSEX = '女'
|
||||
union
|
||||
select
|
||||
sname name,
|
||||
SSEX sex,
|
||||
SBIRTHDAY birthday
|
||||
from STUDENT
|
||||
where SSEX = '女';
|
||||
|
||||
-- 33、查询成绩比该课程平均成绩低的同学的成绩表。
|
||||
SELECT A.*
|
||||
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 a
|
||||
where exists(select *
|
||||
from COURSE b
|
||||
where a.TNO = b.TNO);
|
||||
|
||||
-- 35、查询所有未讲课的教师的Tname和Depart.
|
||||
select
|
||||
TNAME,
|
||||
DEPART
|
||||
from TEACHER a
|
||||
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(SSEX) > 1;
|
||||
|
||||
-- 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(now()) - year(SBIRTHDAY)
|
||||
from STUDENT;
|
||||
|
||||
-- 39、查询Student表中最大和最小的Sbirthday日期值。
|
||||
select min(SBIRTHDAY) birthday
|
||||
from STUDENT
|
||||
union
|
||||
select max(SBIRTHDAY) birthday
|
||||
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, year(now()) - year(SBIRTHDAY) desc;
|
||||
|
||||
-- 41、查询“男”教师及其所上的课程。
|
||||
select *
|
||||
from TEACHER, COURSE
|
||||
where TSEX = '男' and COURSE.TNO = TEACHER.TNO;
|
||||
|
||||
-- 42、查询最高分同学的Sno、Cno和Degree列。
|
||||
select
|
||||
sno,
|
||||
CNO,
|
||||
DEGREE
|
||||
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, CLASS) = (select
|
||||
SSEX,
|
||||
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, STUDENT
|
||||
where SCORE.SNO = STUDENT.SNO and SSEX = '男' and CNO = (
|
||||
select CNO
|
||||
from COURSE
|
||||
where CNAME = '计算机导论');
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user