员工信息
表Waiter用于保存餐厅服务人员的一些基本信息，表的结构如图所示。
图3.29
四、查询
（1）创建单表查询 USE CANYIN_db
SELECT Food.FoodName 名称,Food.FoodPrice 价格 FROM Food
WHERE Food.Foodtype='肉';
图 4.1
21
USE CANYIN_db
SELECT Food.Foodtype,Food.FoodName FROM Food
WHERE Food.Foodnum='2001';
图4.2
USE CANYIN_db
SELECT Guestfood.FoodPrice,Guestfood.G_Foodtype FROM Guestfood
WHERE Guestfood.G_FoodNum='2001';
图4.3
（2）创建多表查询 USE CANYIN_db SELECT
Food.FoodName
菜
名
称
格,Guestfood.G_WaiterName 服务员
22
,Food.FoodPrice
价
FROM Food,Guestfood
WHERE Food.Foodtype='肉' AND Food.FoodName=Guestfood.G_FoodName
图4.4
USE CANYIN_db
SELECT Food.Foodtype,Food.FoodName,Guestfood.G_WaiterName 服务员 FROM Food,Guestfood
WHERE Food.Foodnum='2001' AND Food.FoodName=Guestfood.G_FoodName
图4.5
USE CANYIN_db
SELECT Guestfood.FoodPrice,Guestfood.G_Foodtype,Food.FoodName FROM Food,Guestfood
WHERE Food.Foodnum='2001' AND Food.FoodName=Guestfood.G_FoodName
23
图4.6 ( 3 ) 创建视图
CREATE VIEW Purchase2 AS SELECT P_Time,P_Num FROM Purchase GO
USE CANYIN_db; SELECT*FROM Purchase;
图4.7
五、数据库代码
建库：
CREATE DATABASE [CANYIN_db] ON PRIMARY (
NAME='CANYIN_db',
FILENAME='E:\\数据库\\CANYIN.mdf',
24
