--创建并使用数据库------------*/
create database 50q;
use 50q;
/*-------------------建表-------------------------*/
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(3) 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
);
/*---------------添加主键--------------*/
ALTER TABLE STUDENT ADD PRIMARY KEY (SNO);
ALTER TABLE SCORE ADD PRIMARY KEY (SNO,CNO);
ALTER TABLE COURSE ADD PRIMARY KEY (CNO);
ALTER TABLE TEACHER ADD PRIMARY KEY (TNO);
#--------主键在两张table中的数据类型须一致-------*/
ALTER TABLE SCORE ADD CONSTRAINT FK_SCORE_STUDENT FOREIGN KEY (SNO) REFERENCES STUDENT(SNO);
ALTER TABLE SCORE ADD CONSTRAINT FK_SCORE_COURSE FOREIGN KEY (CNO) REFERENCES COURSE(CNO);
ALTER TABLE COURSE ADD CONSTRAINT FK_COURSE_TEACHER FOREIGN KEY (TNO) REFERENCES TEACHER(TNO);
/*---------------输入记录-------------------*/
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS)
VALUES (108 ,'曾华' ,'男' ,'1977-09-01',95033),
(105 ,'匡明' ,'男' ,'1975-10-02',95031),
(107 ,'王丽' ,'女' ,'1976-01-23',95033),
(101 ,'李军' ,'男' ,'1976-02-20',95033),
(109 ,'王芳' ,'女' ,'1975-02-10',95031),
(103 ,'陆君' ,'男' ,'1974-06-03',95031);
INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)
VALUES (804,'李诚','男','1958-12-02','副教授','计算机系'),
(856,'张旭','男','1969-03-12','讲师','电子工程系'),
(825,'王萍','女','1972-05-05','助教','计算机系'),
(831,'刘冰','女','1977-08-14','助教','电子工程系');
INSERT INTO COURSE(CNO,CNAME,TNO)
VALUES ('3-105' ,'计算机导论',825),
('3-245' ,'操作系统' ,804),
('6-166' ,'数据电路' ,856),
('9-888' ,'高等数学' ,831);
INSERT INTO SCORE(SNO,CNO,DEGREE)
VALUES (103,'3-245',86),(105,'3-245',75),
(109,'3-245',68),(103,'3-105',92),
(105,'3-105',58),(109,'3-105',46),
(101,'3-105',64),(107,'3-105',91),
(108,'3-105',78),(101,'6-166',85),
(107,'6-166',79),(108,'6-166',81);
创建并使用50q数据库
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转载自blog.csdn.net/Long_UP/article/details/106137147
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