--2020年3月28日-29日 周末
1、建表
CREATE TABLE STUDENT
(SNO VARCHAR(3) NOT NULL,
SNAME VARCHAR(4) NOT NULL,
SSEX VARCHAR(2) NOT NULL,
SBIRTHDAY DATE,
CLASS VARCHAR(5));
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (108 ,'曾华' ,'男' ,TO_DATE('2011-2-24','YYYY-MM-DD'),95033);
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (105 ,'匡明' ,'男' ,TO_DATE('1975-10-02','YYYY-MM-DD'),95031);
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (107 ,'王丽' ,'女' ,TO_DATE('1976-01-23','YYYY-MM-DD'),95033);
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (101 ,'李军' ,'男' ,TO_DATE('1976-02-20','YYYY-MM-DD'),95033);
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (109 ,'王芳' ,'女' ,TO_DATE('1976-02-20','YYYY-MM-DD'),95031);
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (103 ,'陆君' ,'男' ,TO_DATE('1974-06-03','YYYY-MM-DD'),95031);
commit;
CREATE TABLE COURSE
(CNO VARCHAR(5) NOT NULL,
CNAME VARCHAR(10) NOT NULL,
TNO VARCHAR(10) NOT NULL);
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);
commit;
CREATE TABLE SCORE
(SNO VARCHAR(3) NOT NULL,
CNO VARCHAR(5) NOT NULL,
DEGREE NUMERIC(10, 1) NOT NULL);
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);
commit;
CREATE TABLE TEACHER
(TNO VARCHAR(3) NOT NULL,
TNAME VARCHAR(4) NOT NULL, TSEX VARCHAR(2) NOT NULL,
TBIRTHDAY DATE NOT NULL, PROF VARCHAR(6),
DEPART VARCHAR(10) NOT NULL);
INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)
VALUES (804,'李诚','男',TO_DATE('1977-08-14','YYYY-MM-DD'),'副教授','计算机系');
INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)
VALUES (856,'张旭','男',TO_DATE('1969-03-12','YYYY-MM-DD'),'讲师','电子工程系');
INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)
VALUES (825,'王萍','女',TO_DATE('1972-05-05','YYYY-MM-DD'),'助教','计算机系');
INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)
VALUES (831,'刘冰','女',TO_DATE('1977-08-14','YYYY-MM-DD'),'助教','电子工程系');
commit;
2、练习题
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;
select depart from teacher group by depart;
3.查询Student表的所有记录。
select sno, sname, ssex, sbirthday, class from student;
4.查询Score表中成绩在60到80之间的所有记录。
select sno, cno, degree from score where degree between 60 and 80;
5.查询Score表中成绩为85，86或88的记录。
select sno, cno, degree 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 sno, sname, ssex, sbirthday, class from student where class = 95031 or ssex = '女';
7.以Class降序查询Student表的所有记录。
select sno, sname, ssex, sbirthday, class from student order by class desc;
8.以Cno升序、Degree降序查询Score表的所有记录。
select sno, cno, degree from score order by cno, degree desc;
9.查询“95031”班的学生人数。
select count(1) 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, degree 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) from score group by cno having count(1) > 5 and substr(cno,1,1) = 3);
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
intersect
select sno from score group by sno having max(degree) < 90;
14.查询所有学生的Sname、Cno和Degree列。
select sname, cno, degree from score ,student where score.sno = student.sno;
15.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 > all (select degree from score where sno = 109)
and cno = '3-105');
16..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 to_char(sbirthday, 'yyyy') =
to_char((select sbirthday from student where sno = 108), 'yyyy');
17.查询“张旭“教师任课的学生成绩。
select degree
from score
where cno =
(select cno
from course
where tno = (select tno from teacher where tname = '张旭'));
18.查询95033班和95031班全体学生的记录。
select * from student where class in (95033,95031);
19.查询存在有85分以上成绩的课程Cno.
select distinct cno from score where degree>85;
20.查询所有教师和同学的name、sex和birthday.
select tname, tsex, tbirthday from teacher
union all
select sname, ssex, sbirthday from student;
21.查询所有“女”教师和“女”同学的name、sex和birthday.
select tname, tsex, tbirthday from teacher where tsex='女'
union all
select sname, ssex, sbirthday from student where ssex='女';
22.查询成绩比该课程平均成绩低的同学的成绩表。（需要讲解）
select sno, degree, av
from (select s.*, avg(degree) over(partition by cno) av from score s)
where degree < av;
23.查询所有任课教师的Tname和Depart.
select tname,depart from teacher;
24.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 where cno in (select cno from score));
25.查询至少有2名男生的班号。
select class from student where ssex='男' group by class having count(1)>1;
26.查询Student表中不姓“王”的同学记录。
select * from student where (instr(sname, '王')) = 0;
27.查询Student表中每个学生的姓名和年龄。
select sname, to_char(sysdate,'yyyy')-to_char(sbirthday,'yyyy') from student;
28.查询Student表中最大和最小的Sbirthday日期值。
select max(sbirthday),min(sbirthday) from student;
29.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, sbirthday;
30.查询和“李军”同性别的所有同学的Sname.
select sname from student where ssex in (select ssex from student where sname='李军') and sname!='李军';