用sql语句创建表商品(编号,商品名,价格,备注)将价格设检查约束为2~200_工具

create table 商品表(编号 char(10) primary key,商品名 varchar(20),价格 int,备注 varchar(80));

update 商品表 set 商品名='方便面' where 商品号='001'

CREATE TABLE

表名＿客户表

（

列名1 类型是否为空，

列名2 类型是否为空，

列名3 类型是否为空

）

例如：

Create table 客户表

（

姓名 char(16) NOT NULL,

电话 char(11) NOT NULL,

)

注意：在建表前先要选择数据库，

解题思路分析：

第一步：创建表，确定数据类型，建立约束

--删除数据表

drop table purcase;

drop table product;

drop table customer;

---创建数据表

---解题思路分析：

---第一步：创建表，确定数据类型，建立约束

----创建商品表product

create table product (

productid varchar2(10) ,

productname varchar2(20) NOT NULL,

unitprice number,

category varchar2(20),

provider varchar2(20),

CONSTRAINT pk_productid primary key (productid),

CONSTRAINT CK_unitprice CHECK (unitprice>0)

);

--创建顾客表customer：

create table customer(

customerid varchar2(10),

name varchar2(20) NOT NULL,

location varchar2(20),

CONSTRAINT pk_customerid primary key(customerid)

);

--创建购买记录表 purcase：

create table purcase(

customerid varchar2(10),

productid varchar2(10),

quantity number,

CONSTRAINT FK_customerid FOREIGN KEY(customerid) REFERENCES customer(customerid) on delete cascade,

CONSTRAINT FK_productid FOREIGN KEY(productid) REFERENCES product(productid) on delete cascade,

CONSTRAINT CK_quantity CHECK(quantity BETWEEN 0 AND 20)

);

---测试数据的编写：

insert into product (productid,productname,unitprice,category,provider)

values('M01','佳洁士',800,'牙膏','宝洁');

insert into product (productid,productname,unitprice,category,provider)

values('M02','高露洁',650,'牙膏','高露洁');

insert into product (productid,productname,unitprice,category,provider)

values('M03','洁诺',500,'牙膏','联合利华');

insert into product (productid,productname,unitprice,category,provider)

values('M04','舒肤佳',300,'香皂','宝洁');

insert into product (productid,productname,unitprice,category,provider)

values('M05','夏士莲',500,'香皂','联合利华');

insert into product (productid,productname,unitprice,category,provider)

values('M06','雕牌',800,'洗衣粉','纳爱斯');

insert into product (productid,productname,unitprice,category,provider)

values('M07','中华',350,'牙膏','联合利华');

insert into product (productid,productname,unitprice,category,provider)

values('M08','汰渍',300,'洗衣粉','宝洁');

insert into product (productid,productname,unitprice,category,provider)

values('M09','碧浪',400,'洗衣粉','宝洁');

insert into customer (customerid, name ,location)

values('C01','Dennis','海淀');

insert into customer (customerid, name ,location)

values('C02','John','朝阳');

insert into customer (customerid, name ,location)

values('C03','Tom','东城');

insert into customer (customerid, name ,location)

values('C04','Jenny','东城');

insert into customer (customerid, name ,location)

values('C05','Rick','西城');