SQL Server存储过程复习（一）

 1 --存储过程学习篇
 2 
 3 --1.简单存储过程不带参数的学习
 4 IF OBJECT_ID(‘Orders_GetAllOrders‘,‘P‘) IS  NOT NULL 
 5 DROP PROCEDURE Orders_GetAllOrders;
 6 GO
 7 CREATE PROC  Orders_GetAllOrders
 8 AS
 9 SET NOCOUNT ON;
10 SELECT * FROM dbo.Orders
11 GO 
12 
13 --2.简单存储过程，带参数
14 IF OBJECT_ID(‘Orders_GetAllByName‘,‘P‘) IS NOT NULL
15 DROP PROCEDURE Orders_GetAllByName;
16 GO 
17 CREATE PROCEDURE Orders_GetAllByName
18 @ShipName NVARCHAR(40)
19 AS 
20 SELECT * FROM dbo.Orders
21 WHERE ShipName=@ShipName
22 GO 
23 
24 --执行带参数的存储过程
25 EXEC Orders_GetAllByName @ShipName=N‘Hanari Carnes‘
26 
27 
28 --3.使用带有通配符参数的简单存储过程
29 
30 IF OBJECT_ID(‘Employees_GetAllByName‘,‘P‘) IS NOT NULL
31 DROP PROCEDURE Employees_GetAllByName;
32 GO 
33 CREATE PROCEDURE Employees_GetAllByName
34 @FirstName NVARCHAR(10)=N‘%‘,
35 @LastName  NVARCHAR(20)=N‘D%‘
36 AS 
37 SELECT * FROM dbo.Employees
38 WHERE FirstName LIKE @FirstName AND LastName LIKE @LastName;
39 
40 --执行存储过程
41 EXECUTE dbo.Employees_GetAllByName @FirstName = N‘Nancy‘, -- nvarchar(10)
42     @LastName = N‘Davolio‘ -- nvarchar(20)
43 
44 
45 --4.返回多个结果集
46 IF OBJECT_ID(‘GetManyResultsCount‘,‘P‘) IS NOT NULL
47 DROP PROCEDURE GetManyResultsCount;
48 GO 
49 CREATE PROCEDURE GetManyResultsCount
50 AS 
51 SELECT COUNT(*) FROM dbo.Orders;
52 SELECT COUNT(*) FROM dbo.Employees;
53 GO  
54 
55 --执行存储过程
56 EXEC GetManyResultsCount;
57 
58 --使用 OUTPUT 参数的存储过程
59 IF OBJECT_ID(‘GetmanyProducts‘,‘P‘) IS NOT NULL 
60 DROP PROCEDURE GetmanyProducts;
61 GO 
62 CREATE PROCEDURE GetmanyProducts
63 @ProductName NVARCHAR(40),
64 @MaxPrice MONEY,
65 @ComparePrice MONEY OUTPUT,
66 @UnitPrice MONEY OUTPUT
67 AS 
68 SELECT p.ProductName,p.UnitPrice FROM dbo.Products AS P
69 INNER JOIN dbo.Categories AS C ON C.CategoryID = P.CategoryID
70 WHERE p.ProductName LIKE @ProductName AND p.UnitPrice<@MaxPrice
71 
72 --设置输出参数
73 SET @UnitPrice=(
74 SELECT  MAX(P.UnitPrice) FROM dbo.Products AS P
75 JOIN dbo.Categories AS C ON C.CategoryID = P.CategoryID
76 WHERE p.ProductName LIKE @ProductName AND p.UnitPrice<@MaxPrice
77 )
78 SET @ComparePrice=@MaxPrice;