لطفا منتظر باشید ...
What Is a Stored Procedure?
A Transact-SQL stored procedure is a set of T-SQL code that is stored in a SQL Server database and compiled when used. You create this set of code using the CREATE PROCEDURE command. You can use most Transact-SQL commands in a stored procedure; however, some commands (such as CREATE PROCEDURE, CREATE VIEW, SET SHOWPLAN_TEXT, SET SHOWPLAN_ALL, and so forth) must be the first (or only) statement in a command batch, and therefore aren't allowed in stored procedures. Most Transact-SQL commands behave the same in a stored procedure as they do in a command batch, but some have special capabilities or exhibit different behavior when executed within the context of a stored procedure. Listing 1-1 shows a simple stored procedure (only the code from the CREATE PROCEDURE line down to the ensuing GO actually constitutes the stored procedure):
Listing 1-1 A simple stored procedure.
Use Northwind
GO
IF OBJECT_ID('dbo.ListCustomersByCity') IS NOT NULL
DROP PROC dbo.ListCustomersByCity
GO
CREATE PROCEDURE dbo.ListCustomersByCity @Country nvarchar(30)='%'
AS
SELECT City, COUNT(*) AS NumberOfCustomers
FROM Customers
WHERE Country LIKE @Country
GROUP BY City
GO
EXEC dbo.ListCustomersByCity
