Stored Procedure in SQL Server

Question

Hi What is the Stored Procedure in SQL Server and give the Advantages and Disadvantages of the Stored Procedure ?

Senthilkumar · Answer

The Stored procedure is compiled t-sql program stored as object under the database. It will use the cache execution plan for all the subsequent requests. It can accept parameters. Advantages of the stored procedure It will improve the execution. It will compile once and be stored as an object under the database. The same execution plan will be used for all the subsequent execution. It will reduce the network traffic. It will have only a few bytes of parameters. But the inline query will make more traffic. It will be stored in the SQL Server database and any number of applications which return in the multiple languages/application can utilizes the same stored procedure. The permission can be set to the stored procedure. The stored procedure can be changed the logics without redeploying the application in circumstances. The application developers can work in the front end and the SQL developers they can write the SQL Server.

Satyapriya Nayak · Answer

Hi Arun A stored procedure is a group of sql statements that has been created and stored in the database. Stored procedure will accept input parameters so that a single procedure can be used over the network by several clients using different input data. Stored procedure will reduce network traffic and increase the performance. If we modify stored procedure all the clients will get the updated stored procedure Sample of creating Stored Procedure USE AdventureWorks2008R2; GO CREATE PROCEDURE dbo.sp_who AS SELECT FirstName LastName FROM Person.Person; GO EXEC sp_who; EXEC dbo.sp_who; GO DROP PROCEDURE dbo.sp_who; GO Advantages of using stored procedures a) a) Stored procedure allows modular programming. You can create the procedure once store it in the database and call it any number of times in your program. b) b) Stored Procedure allows faster execution. If the operation requires a large amount of SQL code is performed repetitively stored procedures can be faster. They are parsed and optimized when they are first executed and a compiled version of the stored procedure remains in memory cache for later use. This means the stored procedure does not need to be reparsed and reoptimized with each use resulting in much faster execution times. c) c) Stored Procedure can reduce network traffic. An operation requiring hundreds of lines of Transact-SQL code can be performed through a single statement that executes the code in a procedure rather than by sending hundreds of lines of code over the network. d) d) Stored procedures provide better security to your data Users can be granted permission to execute a stored procedure even if they do not have permission to execute the procedure's statements directly. In SQL we are having different types of stored procedures are there a) System Stored Procedures b) User Defined Stored procedures c) Extended Stored Procedures System Stored Procedures: System stored procedures are stored in the master database and these are starts with a sp_ prefix. These procedures can be used to perform variety of tasks to support sql server functions for external application calls in the system tables Ex: sp_helptext [StoredProcedure_Name] User Defined Stored Procedures: User Defined stored procedures are usually stored in a user database and are typically designed to complete the tasks in the user database. While coding these procedures don't use sp_ prefix because if we use the sp_ prefix first it will check master database then it comes to user defined database Extended Stored Procedures: Extended stored procedures are the procedures that call functions from DLL files. Now a day's extended stored procedures are depreciated for that reason it would be better to avoid using of Extended Stored procedures. Please refer the below link http://www.aspdotnet-suresh.com/2011/07/what-is-stored-procedure-in-sql-server.html Thanks