484 lines
12 KiB
SQL
484 lines
12 KiB
SQL
use fuxi;
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CREATE TABLE STUDENT
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(
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SNO VARCHAR(3) NOT NULL,
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SNAME VARCHAR(4) NOT NULL,
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SSEX VARCHAR(2) NOT NULL,
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SBIRTHDAY DATETIME,
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CLASS VARCHAR(5)
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);
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CREATE TABLE COURSE
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(
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CNO VARCHAR(5) NOT NULL,
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CNAME VARCHAR(10) NOT NULL,
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TNO VARCHAR(10) NOT NULL
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);
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CREATE TABLE SCORE
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(
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SNO VARCHAR(3) NOT NULL,
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CNO VARCHAR(5) NOT NULL,
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DEGREE NUMERIC(10, 1) NOT NULL
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);
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CREATE TABLE TEACHER
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(
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TNO VARCHAR(3) NOT NULL,
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TNAME VARCHAR(4) NOT NULL,
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TSEX VARCHAR(2) NOT NULL,
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TBIRTHDAY DATETIME NOT NULL,
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PROF VARCHAR(6),
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DEPART VARCHAR(10) NOT NULL
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);
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INSERT INTO STUDENT (SNO, SNAME, SSEX, SBIRTHDAY, CLASS) VALUES (108, '曾华'
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, '男', '1977-09-01', 95033);
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INSERT INTO STUDENT (SNO, SNAME, SSEX, SBIRTHDAY, CLASS) VALUES (105, '匡明'
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, '男', '1975-10-02', 95031);
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INSERT INTO STUDENT (SNO, SNAME, SSEX, SBIRTHDAY, CLASS) VALUES (107, '王丽'
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, '女', '1976-01-23', 95033);
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INSERT INTO STUDENT (SNO, SNAME, SSEX, SBIRTHDAY, CLASS) VALUES (101, '李军'
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, '男', '1976-02-20', 95033);
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INSERT INTO STUDENT (SNO, SNAME, SSEX, SBIRTHDAY, CLASS) VALUES (109, '王芳'
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, '女', '1975-02-10', 95031);
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INSERT INTO STUDENT (SNO, SNAME, SSEX, SBIRTHDAY, CLASS) VALUES (103, '陆君'
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, '男', '1974-06-03', 95031);
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INSERT INTO COURSE (CNO, CNAME, TNO) VALUES ('3-105', '计算机导论', 825);
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INSERT INTO COURSE (CNO, CNAME, TNO) VALUES ('3-245', '操作系统', 804);
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INSERT INTO COURSE (CNO, CNAME, TNO) VALUES ('6-166', '数据电路', 856);
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INSERT INTO COURSE (CNO, CNAME, TNO) VALUES ('9-888', '高等数学', 100);
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INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (103, '3-245', 86);
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INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (105, '3-245', 75);
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INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (109, '3-245', 68);
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INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (103, '3-105', 92);
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INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (105, '3-105', 88);
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INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (109, '3-105', 76);
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INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (101, '3-105', 64);
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INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (107, '3-105', 91);
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INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (101, '6-166', 85);
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INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (107, '6-106', 79);
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INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (108, '3-105', 78);
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INSERT INTO SCORE (SNO, CNO, DEGREE) VALUES (108, '6-166', 81);
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INSERT INTO TEACHER (TNO, TNAME, TSEX, TBIRTHDAY, PROF, DEPART)
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VALUES (804, '李诚', '男', '1958-12-02', '副教授', '计算机系');
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INSERT INTO TEACHER (TNO, TNAME, TSEX, TBIRTHDAY, PROF, DEPART)
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VALUES (856, '张旭', '男', '1969-03-12', '讲师', '电子工程系');
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INSERT INTO TEACHER (TNO, TNAME, TSEX, TBIRTHDAY, PROF, DEPART)
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VALUES (825, '王萍', '女', '1972-05-05', '助教', '计算机系');
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INSERT INTO TEACHER (TNO, TNAME, TSEX, TBIRTHDAY, PROF, DEPART)
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VALUES (831, '刘冰', '女', '1977-08-14', '助教', '电子工程系');
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-- 1、 查询Student表中的所有记录的Sname、Ssex和Class列。
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select
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SNAME,
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SSEX,
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CLASS
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from STUDENT;
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-- 2、 查询教师所有的单位即不重复的Depart列。
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select distinct DEPART
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from TEACHER1;
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-- 3、 查询Student表的所有记录。
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select *
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from STUDENT;
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-- 4、 查询Score表中成绩在60到80之间的所有记录。
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select *
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from SCORE
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where DEGREE > 60 and DEGREE < 80;
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-- 5、 查询Score表中成绩为85，86或88的记录。
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select *
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from SCORE
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where DEGREE = 85 or DEGREE = 86 or DEGREE = 88;
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-- 6、 查询Student表中“95031”班或性别为“女”的同学记录。
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select *
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from STUDENT
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where CLASS = '95031' or SSEX = '女';
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-- 7、 以Class降序查询Student表的所有记录。
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select *
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from STUDENT
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order by CLASS desc;
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-- 8、 以Cno升序、Degree降序查询Score表的所有记录。
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select *
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from SCORE
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order by CNO asc, DEGREE desc;
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-- 9、 查询“95031”班的学生人数。
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select count(*)
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from STUDENT
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where CLASS = '95031';
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-- 10、查询Score表中的最高分的学生学号和课程号。
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select
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sno,
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CNO
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from SCORE
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where DEGREE = (
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select max(DEGREE)
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from SCORE
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);
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-- 11、查询‘3-105’号课程的平均分。
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select avg(DEGREE)
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from SCORE
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where CNO = '3-105';
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-- 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。
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select
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avg(DEGREE),
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CNO
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from SCORE
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where cno like '3%'
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group by CNO
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having count(*) > 5;
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-- 13、查询最低分大于70，最高分小于90的Sno列。
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select SNO
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from SCORE
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group by SNO
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having min(DEGREE) > 70 and max(DEGREE) < 90;
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-- 14、查询所有学生的Sname、Cno和Degree列。
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select
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SNAME,
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CNO,
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DEGREE
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from STUDENT, SCORE
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where STUDENT.SNO = SCORE.SNO;
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-- 15、查询所有学生的Sno、Cname和Degree列。
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select
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SCORE.SNO,
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CNO,
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DEGREE
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from STUDENT, SCORE
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where STUDENT.SNO = SCORE.SNO;
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-- 16、查询所有学生的Sname、Cname和Degree列。
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SELECT
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A.SNAME,
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B.CNAME,
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C.DEGREE
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FROM STUDENT A
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JOIN (COURSE B, SCORE C)
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ON A.SNO = C.SNO AND B.CNO = C.CNO;
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-- 17、查询“95033”班所选课程的平均分。
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select avg(DEGREE)
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from SCORE
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where sno in (select SNO
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from STUDENT
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where CLASS = '95033');
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-- 18、假设使用如下命令建立了一个grade表：
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create table grade (
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low numeric(3, 0),
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upp numeric(3),
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rank char(1)
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);
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insert into grade values (90, 100, 'A');
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insert into grade values (80, 89, 'B');
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insert into grade values (70, 79, 'C');
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insert into grade values (60, 69, 'D');
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insert into grade values (0, 59, 'E');
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-- 现查询所有同学的Sno、Cno和rank列。
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SELECT
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A.SNO,
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A.CNO,
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B.RANK
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FROM SCORE A, grade B
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WHERE A.DEGREE BETWEEN B.LOW AND B.UPP
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ORDER BY RANK;
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-- 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。
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select *
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from SCORE
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where CNO = '3-105' and DEGREE > (
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select DEGREE
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from SCORE
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where SNO = '109' and CNO = '3-105'
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);
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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';
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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';
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-- 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
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select *
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from SCORE
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where DEGREE < (select MAX(DEGREE)
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from SCORE)
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group by SNO
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having count(*) > 1;
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-- 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。
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-- 同19
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-- 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。
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select
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SNO,
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SNAME,
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SBIRTHDAY
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from STUDENT
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where year(SBIRTHDAY) = (
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select year(SBIRTHDAY)
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from STUDENT
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where SNO = '108'
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);
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-- 23、查询“张旭“教师任课的学生成绩。
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select *
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from SCORE
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where cno = (
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select CNO
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from COURSE
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inner join TEACHER on COURSE.TNO = TEACHER.TNO and TNAME = '张旭'
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);
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-- 24、查询选修某课程的同学人数多于5人的教师姓名。
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select TNAME
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from TEACHER
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where TNO = (
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select TNO
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from COURSE
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where CNO = (select CNO
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from SCORE
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group by CNO
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having count(SNO) > 5)
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);
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-- 25、查询95033班和95031班全体学生的记录。
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select *
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from STUDENT
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where CLASS in ('95033', '95031');
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-- 26、查询存在有85分以上成绩的课程Cno.
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select cno
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from SCORE
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group by CNO
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having MAX(DEGREE) > 85;
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-- 27、查询出“计算机系“教师所教课程的成绩表。
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select *
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from SCORE
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where CNO in (select CNO
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from TEACHER, COURSE
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where DEPART = '计算机系' and COURSE.TNO = TEACHER.TNO);
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-- 28、查询“计算机系”与“电子工程系“不同职称的教师的Tname和Prof
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select
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tname,
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prof
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from TEACHER
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where depart = '计算机系' and prof not in (
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select prof
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from TEACHER
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where depart = '电子工程系'
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);
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-- 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。
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select
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CNO,
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SNO,
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DEGREE
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from SCORE
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where CNO = '3-105' and DEGREE > any (
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select DEGREE
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from SCORE
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where CNO = '3-245'
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)
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order by DEGREE desc;
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-- 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.
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SELECT *
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FROM SCORE
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WHERE DEGREE > ALL (
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SELECT DEGREE
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FROM SCORE
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WHERE CNO = '3-245'
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)
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ORDER by DEGREE desc;
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-- 31、查询所有教师和同学的name、sex和birthday.
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select
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TNAME name,
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TSEX sex,
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TBIRTHDAY birthday
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from TEACHER
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union
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select
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sname name,
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SSEX sex,
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SBIRTHDAY birthday
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from STUDENT;
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-- 32、查询所有“女”教师和“女”同学的name、sex和birthday.
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select
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TNAME name,
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TSEX sex,
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TBIRTHDAY birthday
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from TEACHER
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where TSEX = '女'
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union
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select
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sname name,
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SSEX sex,
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SBIRTHDAY birthday
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from STUDENT
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where SSEX = '女';
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-- 33、查询成绩比该课程平均成绩低的同学的成绩表。
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SELECT A.*
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FROM SCORE A
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WHERE DEGREE < (SELECT AVG(DEGREE)
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FROM SCORE B
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WHERE A.CNO = B.CNO);
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-- 34、查询所有任课教师的Tname和Depart.
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select
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TNAME,
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DEPART
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from TEACHER a
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where exists(select *
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from COURSE b
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where a.TNO = b.TNO);
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-- 35、查询所有未讲课的教师的Tname和Depart.
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select
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TNAME,
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DEPART
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from TEACHER a
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where tno not in (select tno
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from COURSE);
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-- 36、查询至少有2名男生的班号。
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select CLASS
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from STUDENT
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where SSEX = '男'
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group by CLASS
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having count(SSEX) > 1;
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-- 37、查询Student表中不姓“王”的同学记录。
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select *
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from STUDENT
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where SNAME not like "王%";
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-- 38、查询Student表中每个学生的姓名和年龄。
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select
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SNAME,
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year(now()) - year(SBIRTHDAY)
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from STUDENT;
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-- 39、查询Student表中最大和最小的Sbirthday日期值。
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select min(SBIRTHDAY) birthday
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from STUDENT
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union
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select max(SBIRTHDAY) birthday
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from STUDENT;
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-- 40、以班号和年龄从大到小的顺序查询Student表中的全部记录。
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select *
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from STUDENT
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order by CLASS desc, year(now()) - year(SBIRTHDAY) desc;
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-- 41、查询“男”教师及其所上的课程。
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select *
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from TEACHER, COURSE
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where TSEX = '男' and COURSE.TNO = TEACHER.TNO;
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-- 42、查询最高分同学的Sno、Cno和Degree列。
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select
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sno,
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CNO,
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DEGREE
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from SCORE
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where DEGREE = (select max(DEGREE)
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from SCORE);
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-- 43、查询和“李军”同性别的所有同学的Sname.
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select sname
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from STUDENT
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where SSEX = (select SSEX
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from STUDENT
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where SNAME = '李军');
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-- 44、查询和“李军”同性别并同班的同学Sname.
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select sname
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from STUDENT
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where (SSEX, CLASS) = (select
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SSEX,
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CLASS
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from STUDENT
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where SNAME = '李军');
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-- 45、查询所有选修“计算机导论”课程的“男”同学的成绩表
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select *
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from SCORE, STUDENT
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where SCORE.SNO = STUDENT.SNO and SSEX = '男' and CNO = (
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select CNO
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from COURSE
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where CNAME = '计算机导论');
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-- 46、使用游标方式来同时查询每位同学的名字，他所选课程及成绩。
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declare
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cursor student_cursor is
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select S.SNO,S.SNAME,C.CNAME,SC.DEGREE as DEGREE
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from STUDENT S, COURSE C, SCORE SC
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where S.SNO=SC.SNO
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and SC.CNO=C.CNO;
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student_row student_cursor%ROWTYPE;
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begin
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open student_cursor;
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loop
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fetch student_cursor INTO student_row;
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exit when student_cursor%NOTFOUND;
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dbms_output.put_line( student_row.SNO || '' ||
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student_row.SNAME|| '' || student_row.CNAME || '' ||
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student_row.DEGREE);
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end loop;
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close student_cursor;
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END;
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/
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-- 47、 声明触发器指令，每当有同学转换班级时执行触发器显示当前和之前所在班级。
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CREATE OR REPLACE TRIGGER display_class_changes
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AFTER DELETE OR INSERT OR UPDATE ON student
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FOR EACH ROW
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WHEN (NEW.sno > 0)
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BEGIN
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dbms_output.put_line('Old class: ' || :OLD.class);
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dbms_output.put_line('New class: ' || :NEW.class);
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END;
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/
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Update student
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set class=95031
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where sno=109;
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-- 48、 删除已设置的触发器指令
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DROP TRIGGER display_class_changes;
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