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Asked by Agastya Last Modified
Answer In Microsoft SQL Server, the equivalent of materialized views is known as an "Indexed View" or "Materialized Indexed View." Indexed views provide a mechanism for precomputing and storing the result set of a query, allowing for improved query performance by avoiding the need to compute the result set each time the view is queried.
Here are the key points about Indexed Views in SQL Server:
Definition:
SELECT statement that represents the data to be stored.Indexing:
Requirements:
Maintainability:
Query Optimization:
Here's a simple example of creating an indexed view:
-- Create base table CREATE TABLE dbo.Orders ( OrderID INT PRIMARY KEY, CustomerID INT, OrderDate DATE ); -- Create a clustered index on the base table CREATE CLUSTERED INDEX IX_Orders_OrderID ON dbo.Orders(OrderID); -- Create an indexed view CREATE VIEW dbo.OrdersView WITH SCHEMABINDING AS SELECT CustomerID, COUNT_BIG(*) AS OrderCount FROM dbo.Orders GROUP BY CustomerID; -- Create an index on the indexed view CREATE UNIQUE CLUSTERED INDEX IX_OrdersView_CustomerID ON dbo.OrdersView(CustomerID); In this example, the OrdersView is an indexed view that aggregates the order count for each customer. The view is created with the WITH SCHEMABINDING option, and a clustered index is defined on the CustomerID column. This allows for efficient querying of the summarized data. Keep in mind that the view definition must adhere to certain restrictions, such as not using non-deterministic functions.
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