1. ايندکس ها مباحث اين جلسه B-Tree ها ، Page ها و Extent ها مفهوم Page Split و پيشگيري از آن ايجاد ، استفاده و تغيير انواع ايندکس ها ايندکس هاي XML نگهداري و به روز رساني Index ها

7. NON-CLUSTERED INDEX On a Heap

8. NON-CLUSTERED INDEX On a CLUSTERED INDEX

10. انواع سيستم هاي ديتابيس OLTP (Online Transaction Processing) OLAP (Online Analytical Processing)

11. CREATE [UNIQUE] [CLUSTERED|NONCLUSTERED] INDEX ON ( [ASC|DESC] [,...n]) INCLUDE ( [,...n]) [WITH [PAD_INDEX = { ON | OFF }] [[,] FILLFACTOR = ] [[,] IGNORE_DUP_KEY = { ON | OFF }] [[,] DROP_EXISTING = { ON | OFF }] [[,] STATISTICS_NORECOMPUTE = { ON | OFF }] [[,] SORT_IN_TEMPDB = { ON | OFF }] [[,] ONLINE = { ON | OFF } [[,] ALLOW_ROW_LOCKS = { ON | OFF } [[,] ALLOW_PAGE_LOCKS = { ON | OFF } [[,] MAXDOP = ] [ON { | | DEFAULT }]

12. NONCLUSTERED INDEX مثال از يک CREATE TABLE MyTableKeyExample ( Column1 int IDENTITY PRIMARY KEY NONCLUSTERED, Column2 int )

13. XML Indexes The table containing the XML you want to index must have a clustered index on it. A “primary” XML index must exist on the XML data column before you can create “secondary” indexes XML indexes can be created only on columns of XML type (and an XML index is the only kind of index you can create on columns of that type). The XML column must be part of a base table — you cannot create the index on a view.

14. XML INDEX نحوه ايجاد يک USE [databaseName] GO SET ARITHABORT ON GO SET CONCAT_NULL_YIELDS_NULL ON GO SET QUOTED_IDENTIFIER ON GO SET ANSI_NULLS ON GO SET ANSI_PADDING ON GO SET NUMERIC_ROUNDABORT OFF GO

15. XML INDEX ادامه ايجاد CREATE PRIMARY XML INDEX [test] ON [dbo].[test] ([xmldata] ) WITH (PAD_INDEX = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 100) GO

16. ساخت مجدد ايندکس ALTER INDEX PK_SalesOrderDetail_SalesOrderID_SalesOrderDetail ID ON Sales.SalesOrderDetail REBUILD WITH (FILLFACTOR = 100)

17. ALTER INDEX { | ALL } ON { REBUILD [ [ WITH ( [ PAD_INDEX = { ON | OFF } ] | [[,] FILLFACTOR = | [[,] SORT_IN_TEMPDB = { ON | OFF } ] | [[,] IGNORE_DUP_KEY = { ON | OFF } ] | [[,] STATISTICS_NORECOMPUTE = { ON | OFF } ] | [[,] ONLINE = { ON | OFF } ] | [[,] ALLOW_ROW_LOCKS = { ON | OFF } ] | [[,] ALLOW_PAGE_LOCKS = { ON | OFF } ] | [[,] MAXDOP = ) ]

18. | [ PARTITION = [ WITH ( [,...n ] ) ] ] ] | DISABLE | REORGANIZE [ PARTITION = ] [ WITH ( LOB_COMPACTION = { ON | OFF } ) ] | SET ([ ALLOW_ROW_LOCKS= { ON | OFF } ] | [[,] ALLOW_PAGE_LOCKS = { ON | OFF } ] | [[,] IGNORE_DUP_KEY = { ON | OFF } ] | [[,] STATISTICS_NORECOMPUTE = { ON | OFF } ] ) } [ ; ]

19. DBCC SHOWCONTIG ([table name], [index name]) Pages Scanned Extents Scanned Extent Switches Avg. Pages per Extent Scan Density [Best Count: Actual Count] Logical Scan Fragmentation Extent Scan Fragmentation Avg. Bytes Free per Page Avg. Page Density

20. DBCC DBREINDEX(db.owner.table[,index name[,fill factor]])) DBCC DBREINDEX(OrderDetails,indexName,65]]))

21. انتخاب ايندکس مناسب Use Indexes (either CI or NCI) in Foreign Keys Range Selects (BETWEEN,,Aggregate, Sortes)  Clustered Indexes High Selectivity  NON-CLUSTERED Indexes Increase Index Count  Decrease Data Altering Instructions Clustered Indexes decrease Alter Instructions Speed So Always Keep Balance in Using Indexes

22. INDEX بدست آوردن اطلاعات مربوط به يک DECLARE @db_id SMALLINT; DECLARE @object_id INT; SET @db_id = DB_ID(N'AdventureWorks2008'); SET @object_id = OBJECT_ID ( N'AdventureWorks2008.Sales.SalesOrderDetail'); SELECT database_id, object_id, index_id, index_depth, avg_fragmentation_in_percent, page_count FROM sys.dm_db_index_physical_stats(@db_id,@object_id,NUL L,NULL,NULL);

23. نتيجه اجراي اسکريپت قبل