oracle系列练习题

刚学习Oracle，老师给我们布置了一些题目来练习。

题目：

创建四个表，并录入数据

1、student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);

2、course表

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);

3、score表

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);

4、teacher表

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');

问题及解答

--查询Student表中的所有记录的Sname、Ssex和Class列。
select sname,ssex,class from student;
--查询教师所有的单位即不重复的Depart列。
select * from teacher;
select distinct depart from teacher;
--查询Student表的所有记录。
select * from student;
--查询Score表中成绩在60到80之间的所有记录。
select * from score;
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (103,'3-245',60);
--包括两端的60和80用between and
select * from score where degree between 60 and 80;
--不包括两端的数用比较操作符
select * from score where degree>60 and degree<80;
--查询Score表中成绩为85，86或88的记录。
select * from score where degree in(85,86,88);
--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';
--以Class降序查询Student表的所有记录。
select * from student order by class desc;
--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;
--查询“95031”班的学生人数。
select count(*) from student where class='95031';
--查询Score表中的最高分的学生学号和课程号。
select sno,cno from(
  select * from score order by degree desc
) where rownum=1;

--2019年7月2日
--查询‘3-105’号课程的平均分。
select avg(degree) from score where cno exits(select cno from course where cname='3-105');
--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 score group by cno having cno like '3%' and count(*)>5;
--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;
--查询所有学生的Sname、Cno和Degree列。
select sname,cno,degree from student st join score sc on st.sno = sc.sno;--查询所有学生的Sname、Cname和Degree列。
select sname,cname,degree from score sc join course co on sc.cno = co.cno join student st on st.sno = sc.sno;
--查询“95033”班所选课程的平均分。
select avg(degree) from score join student on score.sno = student.sno where class='95033';
--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。
select sno,cno,rank from grade join score on score.degree between low and upp;
select sno,cno,rank from grade,score where score.degree between low and upp;
--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 distinct * from student join score on score.degree>(select distinct degree from score where sno=109 and cno='3-105') and cno='3-105' and score.sno=student.sno order by degree asc;
select distinct * from student,score where score.cno='3-105' and score.degree>(select distinct degree from score where sno='109' and cno='3-105') and student.sno = score.sno;
--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 sno,cno,degree from score t1,(select sno,max(degree) as degree from score group by sno having count(cno)>1) t2 where t1.sno=t2.sno and t1.degree<t2.degree;--2019年7月3日
--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')=(select distinct to_char(sbirthday,'YYYY') from student where sno='108');
--查询“张旭“教师任课的学生成绩。
select distinct * from score where cno in(select distinct cno from course where tno in(select tno from teacher where tname='张旭'));
--查询选修某课程的同学人数多于5人的教师姓名。
select t1.tno,tname,cno,cname from teacher t1 join course t2 on t1.tno = t2.tno
where cno in(select cno from score group by cno having count(sno)>5);
select distinct tname from teacher where tno in(select distinct tno from course where cno in(select cno from score group by cno having count(sno)>5));
--查询95033班和95031班全体学生的记录。
select * from student where class='95033' or class='95031';
--查询存在有85分以上成绩的课程Cno.
select cno from score sc group by cno having max(degree)>85;
select distinct cno from score where degree>85;
--查询出“计算机系“教师所教课程的成绩表。
select degree from teacher t1 join course t2 on t1.tno=t2.tno join score t3 on t3.cno=t2.cno where depart='计算机系';
select * from score where cno in(select distinct cno from course where tno in(select distinct tno from teacher where depart='计算机系'));
--查询“计算机系”与“电子工程系“不同职称的教师的Tname和Prof。
select * from teacher;
select * from teacher where depart='计算机系' or depart='电子工程系';
select tname,prof from teacher where depart in('计算机系','电子工程系') and prof not in(select prof from teacher group by prof having count(*)>1);
select tname,prof from teacher where select * from teacher where depart='计算机系' or depart='电子工程系';
--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;
select * from score where cno='3-105' and degree>any(select degree from score where cno='3-245') order by degree desc;
--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');

--作业704
--查询所有教师和同学的name、sex和birthday.
select tname "姓名",tsex "性别",tbirthday "生日" from teacher union select sname,ssex,sbirthday from student;
--查询所有“女”教师和“女”同学的name、sex和birthday.
select tname "姓名",tsex "性别",tbirthday "生日" from teacher where tsex='女' union select sname,ssex,sbirthday from student where ssex='女';
--查询成绩比该课程平均成绩低的同学的成绩表。
select * from score t1 where cno in(select cno from score group by cno) and degree<(select avg(degree) from score t2 group by cno having t1.cno=t2.cno);
--查询所有任课教师的Tname和Depart.
select tname,depart from teacher where tno in(select tno from course);
--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);
--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;
--查询Student表中不姓“王”的同学记录。
select * from student where sname not in(select sname from student where sname like '王%');
--查询Student表中每个学生的姓名和年龄。
select sname,round(months_between(sysdate,sbirthday)/12) from student;
--查询Student表中最大和最小的Sbirthday日期值。
select max(sbirthday),min(sbirthday) from student;
--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,sbirthday desc;
--查询“男”教师及其所上的课程。
select t1.tname,t2.cname from teacher t1 join course t2 on t1.tno=t2.tno and t1.tsex='男';
--查询最高分同学的Sno、Cno和Degree列。
select sno,cno,degree from score t1 where degree in(select max(degree) from score t2 group by cno);
--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');
--查询和“李军”同性别并同班的同学Sname.
select * from student;
select sname from student where ssex in(select ssex from student where sname='李军') and class in(select class from student where sname='李军');
--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');