MYSQL 部分練習題
在三個表的基礎上:
create table customer(
id varchar(10) primary key,
name varchar(16),
sex varchar(2),
mobile varchar(11),
address varchar(50),
);
create table OrderBook(
csid varchar(10),
cmid varchar(12),
count int(11),
bookdate datetime,
takedate datetime,
check(takedate>bookdate),
check(count>0),
foreign key(csid) references Customer(id),
foreign key(cmid) references Commodity(id),
primary key(csid,cmid)
);
create table Commodity(
ID varchar(12) primary key,
name varchar(20) not null,
manufacture varchar(20),
price decimal(4,2)
);
1. 往基本表Customer中插入顧客元組(”0421F901”,”WU”,”女”,13980011001)
insert into customer values("0421f901","wu","女",13980011001);
2. 往基本表Commodity中插入一條商品記錄(“03110408591”,“牙膏”,“保潔公司”,5.00
insert into commodity values("03110408591","牙膏","保潔公司",5.00);
3. 修改“WANGYAN”顧客定購商品的記錄交貨日期為2005-12-25。
update Orderbook set takedate=‘2005-12-25‘ where csid=(select id from custmoer where name = "WANGYAN");
4. 把“雀巢奶粉”的定購商品記錄全部刪去。
delete count,bookdate,takedate from orderbook where csid=(select id from
commodity where name="雀巢奶粉");
5. 查詢“ANAN”顧客的手機號和住址。
select mobile,address from customer where name="ANAN";
6. 查詢商品的平均價格高於75元錢的廠商名稱。
select MANUFACTURE from Commodity where PRICE in (select avg(PRICE) from Commodity and avg(PRICE)>75);
7. 查詢顧客的定購信息,並按訂貨日期升序排列,若訂貨日期相同,則按定購數量降序排列。
select * from orderbook order by bookdate asc,count desc;
MYSQL 部分練習題