查询索引碎片 useDATABASE_NAME;SELECTdbschemas.[name]as'Schema', dbtables.[name]as'Table', dbindexes.[name]as'Index', indexstats.alloc_unit_type_desc, indexstats.avg_fragmentation_in_percent, indexstats.page_countFROMsys.dm_db_index_physical_stats (DB_ID(),NULL,NULL,NULL,NULL)ASindexstats...
RAISERROR('Error executing index reorganization/rebuild script: Only databases with SQL Server 2005 or later compatibility level are supported', 20, 1)WITHLOG; END IF @verboseMode=1 PRINT'Initial checks completed with no errors.'; -- Temporary table for storing index fragmentation details IF OBJE...
Applies to: SQL Server 2016 (13.x) and later versions.Scope: Global or session. 715 Enables table lock for bulk load operations into a heap with no nonclustered indexes. When this trace flag is enabled, bulk load operations acquire bulk update (BU) locks when bulk copying data into a ...
Alternatively, you can use various SQL Server management views and functions. For example: select S.name as [Schema], O.name as [Object], I.name as [Index], round(P.avg_fragmentation_in_percent, 1) as [Percentage Out-of-Order], round(100.0 - P.avg_page_space_used_in_percent, 1)...
Modifies an existing table or view index (rowstore, columnstore, or XML) by disabling, rebuilding, or reorganizing the index; or by setting options on the index.
Microsoft introduced online resumable index rebuilds in SQL Server 2017. This feature let's you resume an index rebuild, if it would get aborted. Here's to use it: EXECUTE dbo.IndexOptimize @Databases = 'USER_DATABASES', @FragmentationLow = NULL, ...
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL database in Microsoft Fabric Modifies an existing table or view index (rowstore, columnstore, or XML) by disabling, rebuilding, or reorganizing the index; or by ...
Unique constraints and check constraints provide more information for the optimizer to use to create optimal execution plans. A unique constraint gives the optimizer information about the expected results. A check constraint can be used to determine whether a table or index has to be accessed to ...
For example, to fully protect a read of an index, an instance of the Database Engine may have to acquire shared locks on rows and intent shared locks on the pages and table. The following table shows the resources that the Database Engine can lock. Expand table ResourceDescription RID A...
‘Import’ as a different method of migrating the catalogs might cause semantic inconsistency at query time due to the different word breaking behavior of the word breakers that were used to index the imported full-text catalog, and the new word breakers in SQL Server 2008 that parse the ...