Showing posts with label Views in sql. Show all posts
Showing posts with label Views in sql. Show all posts

Thursday 20 August 2015

Difference Between Views And StoredProcedure Sql

Stored Procedure Vs Views


1. Stored Procedure are collection of pre-executed sql Statements that accepts parameters as input and depending on input parameters passed gives the Output Result

Views Act like Virtual Tables That Contains set of Rows and Columns from multiple original table of Database according to defined Query Commands

2. Stored Procedure Cannot be Used as Large Building Block or we can simply say It cannot be treated as tables in large queries 

But Views Can be treated like tables we can Use Views similar to table and execute select statements on Views Similar to Tables

3. Stored Procedures Allow the Use of Data Manipulation Command like Insert Data , Update data on Table or Schemas To Manipulate Data

But Views Cannot have Data Manipulation Command It can only give list of data or View of data based on set of Queries in it . Views cannot be used to Permanently store data in database it allows just to view the data.

4. Views  can have  only one Select Statement Allowed To Use

Store Procedure Can Use Various Set of Statements That also Include If-Else Statements

5. View is a virtual table that only exists when you use the view in a query. Its considered virtual table because it acts like a table, and the same operations that can be performed on a table can be performed on a view. Virtual table doesn't stay in the database, it gets created when we use the view and then delete it. 

But Stored Procedure Physically Exist 

6. Views are Used for Providing Security to data So that by using the Views we can View only Particular view of the schema to the user Not the Full View with required columns. Their is no physical presence of view data anywhere in database.

Stored Procedure allows to perform any type of data Manipulation operation But We can also Put Security Permission on Store Procedure In order to Restrict its Access From Unauthorized User


7. Code Sample For Stored Procedure and Views
/*
This Stored procedure is used to Insert value into the table tbl_students. 
*/

Create Procedure InsertStudentrecord
(
 @StudentFirstName Varchar(200),
 @StudentLastName  Varchar(200),
 @StudentEmail     Varchar(50)
) 
As
 Begin
   Insert into tbl_Students (Firstname, lastname, Email)
   Values(@StudentFirstName, @StudentLastName,@StudentEmail)
 End
 
 
/*
View Example
*/
CREATE VIEW [Category Sales For 1997] AS

SELECT DISTINCT CategoryName,Sum(ProductSales) AS CategorySales

FROM [Product Sales for 1997]

GROUP BY CategoryName