Oracle面试复习（二）

干948

　　
　　现有一个商店的数据库，记录顾客及其购物情况，由下面三个表组成：
　　商品product（商品号productid，商品名productname，单价unitprice，商品类别category，供应商provider，上架日期startdate）；
　　顾客customer（顾客号customerid，姓名name，住址location）；
　　购买purchase（顾客号customerid，商品号productid，购买数量quantity）；
　　
　　试用SQL语言完成下列功能：
　　1. 建表:在定义中要求声明：
　　(1) 每个表的主外码；
　　(2) 顾客的姓名和商品名不能为空值；
　　(3) 单价必须大于0，购买数量必须再0到20之间；
　　
　　
　　

create table rxy_product (
product_id    varchar2(10) not null primary key,
product_name  varchar2(30) not null,
unitprice     number(8,2) default 0.00,
category      varchar2(20),
provider      varchar2(30),
startdate     date,
constraint RXY_UNITPRICE check ( unitprice>0 )
);
create table rxy_customer (
customer_id   varchar2(10) not null primary key,
customer_name varchar2(12) not null,
location      varchar2(50)
);
create table rxy_purchase (
customer_id  varchar2(10) not null,
product_id   varchar2(10) not null,
quantity     number(4,0) default 0,
constraint FK_PRODUCT foreign key(product_id) references rxy_product,
constraint FK_CUSTOMER foreign key(customer_id) references rxy_customer,
constraint RXY_QUANTITY check ( quantity>=0 and quantity<=20 )
);
insert into rxy_product (product_id,product_name,unitprice,category,provider) values( 'M01','佳洁士',8.00,'牙膏','宝洁' );
insert into rxy_product (product_id,product_name,unitprice,category,provider) values( 'M02','高露洁',6.50,'牙膏','高露洁' );
insert into rxy_product (product_id,product_name,unitprice,category,provider) values( 'M03','洁诺',5.00,'牙膏','联合利华' );
insert into rxy_product (product_id,product_name,unitprice,category,provider) values( 'M04','舒肤佳',3.00,'香皂','宝洁' );
insert into rxy_product (product_id,product_name,unitprice,category,provider) values( 'M05','夏士莲',5.00,'香皂','联合利华' );
insert into rxy_product (product_id,product_name,unitprice,category,provider) values( 'M06','雕牌',2.50,'洗衣粉','纳爱斯' );
insert into rxy_product (product_id,product_name,unitprice,category,provider) values( 'M07','中华',3.50,'牙膏','联合利华' );
insert into rxy_product (product_id,product_name,unitprice,category,provider) values( 'M08','汰渍',3.00,'洗衣粉','宝洁' );
insert into rxy_product (product_id,product_name,unitprice,category,provider) values( 'M09','碧浪',4.00,'洗衣粉','宝洁' );
insert into rxy_customer values( 'C01','Dennis','海淀' );
insert into rxy_customer values( 'C02','John','朝阳' );
insert into rxy_customer values( 'C03','Tom','东城' );
insert into rxy_customer values( 'C04','Jenny','东城' );
insert into rxy_customer values( 'C05','Rick','西城' );
insert into rxy_purchase values( 'C01','M01',3 );
insert into rxy_purchase values( 'C01','M05',2 );
insert into rxy_purchase values( 'C01','M08',2 );
insert into rxy_purchase values( 'C02','M02',5 );
insert into rxy_purchase values( 'C02','M06',4 );
insert into rxy_purchase values( 'C03','M01',1 );
insert into rxy_purchase values( 'C03','M05',1 );
insert into rxy_purchase values( 'C03','M06',3 );
insert into rxy_purchase values( 'C03','M08',1 );
insert into rxy_purchase values( 'C04','M03',7 );
insert into rxy_purchase values( 'C04','M04',3 );
insert into rxy_purchase values( 'C05','M06',2 );
insert into rxy_purchase values( 'C05','M07',8 );
/
--（1）求购买了供应商"宝洁"产品的所有顾客；
select customer_name
from rxy_product p,rxy_customer c,rxy_purchase pc
where p.product_id=pc.product_id
and pc.customer_id=c.customer_id
and p.provider='宝洁';
--（2）求购买的商品包含了顾客"Dennis"所购买的所有商品的顾客（姓名）；
select customer_name from rxy_customer where customer_id in (
select customer_id from rxy_purchase
where product_id in
(select pc.product_id from rxy_customer c, rxy_purchase pc where c.customer_id = pc.customer_id and c.customer_name='Dennis')
group by customer_id
having count(product_id)>=
(select count(pc.product_id) from rxy_customer c, rxy_purchase pc where c.customer_id = pc.customer_id and c.customer_name='Dennis')
);
--（3）求牙膏卖出数量最多的供应商。
select rownum, a.* from (
select p.provider, sum(pc.quantity) s from rxy_product p, rxy_purchase pc
where pc.product_id = p.product_id and p.category='牙膏'
group by p.provider
order by s desc) a where rownum=1;
select provider , NUM
from ( select distinct pd.provider ,
(select sum(SUM_NUM) from (
select p.provider pp, (select sum(quantity) from rxy_purchase pc
where pc.product_id=p.product_id
) "SUM_NUM"
from rxy_product p
where category='牙膏'
)
where pp=pd.provider
) "NUM"
from rxy_product pd
where  category='牙膏'
order by NUM desc
)
where rownum=1;
--4 将所有的牙膏商品单价增加10%。
update rxy_product set unitprice=unitprice*1.1 where category='牙膏';
--5 删除从未被购买的商品记录。
select * from rxy_product where product_id not in(select distinct(product_id) from rxy_purchase);
select * from rxy_product p where not exists(select 1 from rxy_purchase pc where p.product_id = pc.product_id);
select * from rxy_product
where product_id in (
select p.product_id from rxy_product p
minus
select pc.product_id  from  rxy_purchase pc
);