To see which indexes the query optimizer uses for a specific query, in SQL Server Management Studio, on the Query menu, select Include Actual Execution Plan. Don't always equate index usage with good performance
The column information is retrieved from the table using only information in the index tree without having to do an additional seek to read the actual row. This strategy can be used when the query uses only columns that are part of a single index. If the Extra column also says Using w...
只有SQL Server 2012 (11.x) 和 SQL Server 2014 (12.x),您才能卸除非叢集索引,才能建立數據行存放區索引。 SQL 複製 DROP INDEX dbo.SimpleTable.nc1_simple; DROP INDEX dbo.SimpleTable.nc2_simple; --Convert the rowstore table to a columnstore index. CREATE CLUSTERED COLUMNSTORE INDEX cci...
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 ...
In doing so, user access to the data is restricted during the operation, but the operation finishes faster and uses fewer resources. On multiprocessor computers that are running SQL Server 2016 (13.x) and later versions, index operations can use parallelism to perform the scan and sort ...
loading interface tables with SQL*Loader overview parameters Payables Open Interface Outbound Advice Payables Open Interface Purge Payables Open Interface Report Payables Open Interface workflow submitting table descriptions troubleshooting updating records in interface table Payables Open Interface...
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 ...
0(default): Uses the actual number of processors or fewer based on the current system workload. For more information, seeConfigure Parallel Index Operations. Note Parallel index operations aren't available in every edition of Microsoft SQL Server. For a list of features that are supported by th...
(从 SqlSmoObject 继承。) ScalarResult Gets the scalar result for the referenced object. (从 SqlSmoObject 继承。) SecondaryXmlIndexType Gets or sets the secondary XML index type. SortInTempdb Gets or sets the Boolean property value that specifies whether the index is sorted using the tempdb ...
In doing so, user access to the data is restricted during the operation, but the operation finishes faster and uses fewer resources. On multiprocessor computers that are running SQL Server 2016 (13.x) and later versions, index operations can use parallelism to perform the scan and sort ...