课后习题 SPJ

CREATE TABLE S
 (

SNO char(2) primary key,

SNAME varchar(20),

STATUS char(4),

CITY char(10)

);

create table P (

PNO char(2) primary key,

PNAME varchar(20),

COLOR char(4),

WEIGHT int

);

create table J (

JNO char(2) primary key,

JNAME varchar(20),

CITY char(10)

);

create table SPJ (

SNO char(2),

PNO char(2),

JNO char(2),

QTY int,

primary key(SNO,PNO,JNO),

foreign key(SNO) references S(SNO) on delete cascade,

foreign key(PNO) references P(PNO) on delete cascade,

foreign key(JNO) references J(JNO) on delete cascade

);

顺便连数据也一起给你好了

insert into S values('S1','供应商一','良好','郑州');

insert into S values('S2','供应商二','良好','天津');

insert into S values('S3','供应商三','良好','上海');

insert into S values('S4','供应商四','优秀','郑州');

insert into P values('P1','管材','红色',20);

insert into P values('P2','管线','绿色',30);

insert into P values('P3','螺帽','红色',10);

insert into P values('P4','螺帽','黄色',10);

insert into J values('J1','一建工程','郑州');

insert into J values('J2','二建工程','郑州');

insert into J values('J3','三建工程','天津');

insert into J values('J4','四建工程','天津');

insert into J values('J5','五建工程','上海');

insert into J values('J6','六建工程','北京');

insert into SPJ values('S1','P1','J1',100);

insert into SPJ values('S1','P2','J1',100);

insert into SPJ values('S2','P1','J1',100);

insert into SPJ values('S2','P2','J1',100);

insert into SPJ values('S1','P1','J3',100);

insert into SPJ values('S1','P2','J3',100);

insert into SPJ values('S2','P1','J3',100);

insert into SPJ values('S2','P2','J3',100);

insert into SPJ values('S3','P1','J2',100);

insert into SPJ values('S3','P2','J2',100);

insert into SPJ values('S4','P3','J2',100);