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STORED POCEDURE

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• A stored procedure is a subroutine available to application that access a relational database system. A stored procedure is actually stored in the database data dictionary.

• Stored procedures are more than just tools for performing repetitive tasks. There are two main types of stored procedure – system stored procedures and user-defined stored procedures.

In sql server it is very easy to create stored procedure. We can create a stored procedure in sql server management studio (SSMS) in following way:

• Creating stored procure using server management studio (SSMS

Step 1: Expand your database name node inSSMS. Then expand Programmability node asshown in the following screenshot:

Step 2: Right click on Stored Procedures nodeand click on New stored procedure...

•

Step 3: It will generate following sql script in new query page:-- ================================================

-- Template generated from Template Explorer using:-- Create Procedure (New Menu).SQL---- Use the Specify Values for Template Parameters-- command (Ctrl-Shift-M) to fill in the parameter-- values below.---- This block of comments will not be included in-- the definition of the procedure.-- ================================================SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGO-- =============================================-- Author: <Author,,Name>-- Create date: <Create Date,,>-- Description: <Description,,>-- =============================================

CREATE PROCEDURE <Procedure_Name, sysname, ProcedureName> -- Add the parameters for the stored procedure here <@Param1, sysname, @p1> <Datatype_For_Param1, , int> =<Default_Value_For_Para

m1, , 0>, <@Param2, sysname, @p2> <Datatype_For_Param2, , int> =<Default_Value_For_Para

m2, , 0>ASBEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. SET NOCOUNT ON;

-- Insert statements for procedure here SELECT <@Param1, sysname, @p1>, <@Param2, sysname, @p2>ENDGO

Step 4: Now edit above script like stored procedure name, parameters, procedure body etc according to your requirement . For example:

-- =============================================-- Author: Exact Help-- Create date: 02/10/2012-- Description: My first stored procedure-- =============================================CREATE PROCEDURE My_First_ProcASBEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. SET NOCOUNT ON;

SELECT 'Exact Help'END

GO

Step 5: To create My_First_Proc stored procedure press F5 button of your keyboard or click on Execute button in SSMS.

• Step 6: After creating it will be stored inside Programmability node. To re-open or edit it expand programmability node and right click on your stored procedure name and choose modify option.

You will get the script of your stored procedure. In this case it will be script of My_First_Proc. Which will something like this:

USE [Exact]GO/****** Object: StoredProcedure [dbo].[My_First_Proc] Script Date: 02/10/2012 10:02:40 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGO-- =============================================-- Author: Exact Help-- Create date: 02/10/2012-- Description: My first stored procedure-- =============================================ALTER PROCEDURE [dbo].[My_First_Proc]ASBEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. SET NOCOUNT ON;

SELECT 'Exact Help'END

Example

CREATE PROCEDURE sp_GetInventory@location varchar(10)ASSELECT Product, QuantityFROM InventoryWHERE Warehouse = @locationEXECUTE sp_GetInventory 'FL’

Advantages of stored procedure

• Precompiled executionSQL Server compiles each stored procedure once andthen reutilizes the execution plan. This results intremendous performance boosts when storedprocedures are called repeatedly.

• Reduced client/server trafficIf network bandwidth is a concern in your environment,you'll be happy to learn that stored procedures canreduce long SQLqueries to a single line that istransmitted over the wire.

• Efficient reuse of code and programming abstraction Stored procedures can be used by multiple users and client

programs. If you utilize them in a planned manner, you'll find the development cycle takes less time.

• Enhanced security controls You can grant users permission to execute a stored procedure

independently of underlying table permissions.

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