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1. SQL 2008 Performance Improvements

5. File Types

9. Partitioning Filegroup test1fg test2fg test3fg test4fg Partition Num. 1 2 3 4 Values col1 <= 1 col1 > 1 AND col1 <= 100 col1 > 100 AND col1 <= 1000 col1 > 1000

11. Multiple Threads per Partition

12. Multiple Threads per Partition Utilises machines with large number of processors, each thread will run on separate CPU.

17. Sparse Columns – Decision Table Data type Nonsparse bytes Sparse bytes NULL percentage bit 0.125 4.125 98% tinyint 1 5 86% smallint 2 6 76% int 4 8 64% bigint 8 12 52% real 4 8 64% float 8 12 52% smallmoney 4 8 64% money 8 12 52% smalldatetime 4 8 64% datetime 8 12 52% uniqueidentifier 16 20 43% date 3 7 69%

21. Filtered Indexes CREATE NONCLUSTERED INDEX INDEX_1 ON Production.BillOfMaterials (ComponentID, StartDate) WHERE EndDate IS NOT NULL ;

24. Sample Existing SP: SELECT TOP 1 * FROM Sales.SalesOrderHeader ORDER BY OrderDate DESC;

25. Sample Override plan: sp_create_plan_guide @name = N'Guide2', @stmt = N'SELECT TOP 1 * FROM Sales.SalesOrderHeader ORDER BY OrderDate DESC', @type = N'SQL', @module_or_batch = NULL, @params = NULL, @hints = N'OPTION (MAXDOP 1)';

26. MERGE Statement Outperforms equivalent multiple statement query which achieve the same query goal. Simplifies multiple operations in 1 query syntax – easy to read and understand. MERGE INTO [AdventureWorks].[Person].[Contact_Base] AS Target USING ( SELECT ContactID,Title,FirstName,MiddleName,LastName,EmailAddress FROM [AdventureWorks].[Person].[Contact_Temp]) AS Source (ContactID,Title,FirstName,MiddleName,LastName,EmailAddress) ON Target.ContactID = Source.ContactID WHEN MATCHED THEN UPDATE SET EmailAddress = Source.EmailAddress WHEN NOT MATCHED BY TARGET THEN INSERT (ContactID,Title,FirstName,MiddleName,LastName,EmailAddress) VALUES (ContactID,Title,FirstName,MiddleName,LastName,EmailAddress);