綜合案例
ddl&dml
有乙個商品資料庫
1.資料表的建立 ddl
先編寫資料庫指令碼
--刪除資料表
drop table purcase purge;
drop table product purge;
drop table customer purge;
--建立資料表
create table product(
product_id varchar2(5),
product_name varchar2(30) not null,
unit_price number,
category varchar2(50),
provider varchar2(50),
constraint pk_product_id primary key(product_id),
constraint ck_unit_price check(unit_price>0)
);create table customer(
customer_id varchar2(5),
customer_name varchar2(30) not null,
location varchar2(50),
constraint pk_customer_id primary key(customer_id)
);create table purcase(
customer_id varchar2(5),
product_id varchar2(5),
quantity number,
constraint fk_customer_id foreign key(customer_id) references customer(customer_id) on delete cascade,
constraint fk_product_id foreign key(product_id) references product(product_id) on delete cascade,
constraint ck_quantity check(quantity)
);--增加測試資料
--增加產品資訊
insert into product(product_id,product_name,unit_price,category,provider)
values('m01','jjs',8.00,'yg','bj');
insert into product(product_id,product_name,unit_price,category,provider)
values('m02','glj',6.50,'yg','glj');
insert into product(product_id,product_name,unit_price,category,provider)
values('m03','jl',5.00,'yg','lhlh');
insert into product(product_id,product_name,unit_price,category,provider)
values('m04','sfj',3.00,'xz','bj');
insert into product(product_id,product_name,unit_price,category,provider)
values('m05','xsl',5.00,'xz','lhlh');
insert into product(product_id,product_name,unit_price,category,provider)
values('m06','dp',2.50,'xyf','nas');
insert into product(product_id,product_name,unit_price,category,provider)
values('m07','zh',3.50,'yg','lhlh');
insert into product(product_id,product_name,unit_price,category,provider)
values('m08','tz',3.00,'xyf','bj');
insert into product(product_id,product_name,unit_price,category,provider)
values('m09','bl',4.00,'xyf','bj');
--增加客戶資訊
insert into customer(customer_id,customer_name,location)
values('c01','dennis','hd');
insert into customer(customer_id,customer_name,location)
values('c02','john','cy');
insert into customer(customer_id,customer_name,location)
values('c03','tom','dc');
insert into customer(customer_id,customer_name,location)
values('c04','jenny','dc');
insert into customer(customer_id,customer_name,location)
values('c05','rick','xc');
--增加購買記錄
insert into purcase(customer_id,product_id,quantity)
values('c01','m01',3);
insert into purcase(customer_id,product_id,quantity)
values('c01','m05',2);
insert into purcase(customer_id,product_id,quantity)
values('c01','m08',2);
insert into purcase(customer_id,product_id,quantity)
values('c02','m02',5);
insert into purcase(customer_id,product_id,quantity)
values('c02','m06',4);
insert into purcase(customer_id,product_id,quantity)
values('c03','m01',1);
insert into purcase(customer_id,product_id,quantity)
values('c03','m05',1);
insert into purcase(customer_id,product_id,quantity)
values('c03','m06',3);
insert into purcase(customer_id,product_id,quantity)
values('c03','m08',1);
insert into purcase(customer_id,product_id,quantity)
values('c04','m03',7);
insert into purcase(customer_id,product_id,quantity)
values('c04','m04',3);
insert into purcase(customer_id,product_id,quantity)
values('c05','m06',2);
insert into purcase(customer_id,product_id,quantity)
values('c05','m07',8);
commit;
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