oracle建表實例

oracle建表實例
rem ///BY MAXUAN 開始///
create table item(
type_id integer not null,
type varchar2(30),
constraint item_pk primary key(type_id)
);

create table product(
product_id integer not null,
title varchar2(30) not null,
type_id integer not null,
info varchar2(80),
price number(16,2) not null,
constraint product_pk primary key (product_id),
constraint product_fk foreign key(type_id) references item(type_id)
);

create table orders(
order_id integer not null,
name varchar2(20) not null,
address varchar2(100),
tel number(16),
email varchar2(30) not null,
btime date,
product_id integer not null,
uword varchar2(100),
constraint orders_pk primary key(order_id),
constraint orders_fk foreign key(product_id) references product(product_id)
);

create table admin(
admin_id integer not null,
adminname varchar2(20) not null,
password varchar2(20) not null,
constraint admin_pk primary key(admin_id)
);

create sequence type_id increment by 1 start with 1;
create sequence product_id increment by 1 start with 1;
create sequence order_id increment by 1 start with 1;
create sequence admin_id increment by 1 start with 1;