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What are indexed views?

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What are indexed views?
posted Aug 22, 2014 by Merry

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Standard SQL Server views can help. When we encapsulate complex multi-table query logic in a view, any application that needs that data is then able to issue a much simpler query against the view, rather than a complex multi-JOIN query against the underlying tables. Views bring other advantages too. We can grant users SELECT permissions on the view, rather than the underlying tables, and use the view to restrict the columns and rows that are accessible to the user. We can use views to aggregate data in a meaningful way.
The query in Listing 1 joins five tables to get information such as the client name, the order number and date, the products and quantities ordered.

SELECT  CUST.CustomerID ,
        PER.FirstName ,
        PER.LastName ,
        SOH.SalesOrderID ,
        SOH.OrderDate ,
        SOH.[Status] ,
        SOD.ProductID ,
        PROD.Name ,
        SOD.OrderQty
FROM    Sales.SalesOrderHeader SOH
        INNER JOIN Sales.SalesOrderDetail SOD 
               ON SOH.SalesOrderID = SOD.SalesOrderID
        INNER JOIN Production.Product PROD
               ON PROD.ProductID = SOD.ProductID
        INNER JOIN Sales.Customer CUST
               ON SOH.CustomerID = CUST.CustomerID
        INNER JOIN Person.Person PER
               ON PER.BusinessEntityID = CUST.PersonID;
answer Aug 24, 2014 by Rahul Singh
once you grant View other user,  you are indirectly granting related tables which were used in View. Views are one time compiled query which is stored in DB. which enables access time much faster rather than executing the query.
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