UPDATE STATISTICS Sales.SalesOrderDetail AK_SalesOrderDetail_rowguid The following example updates the statistics for the AK_SalesOrderDetail_rowguid index of the SalesOrderDetail table. In Object Explorer, connect to an instance of Database Engine.Ĭopy and paste the following example into the query window and click Execute. Using Transact-SQL To update a specific statistics object In the Statistics Properties - statistics_name dialog box, select the Update statistics for these columns check box and then click OK. Right-click the statistics object you wish to update and select Properties. In Object Explorer, click the plus sign to expand the database in which you want to update the statistic.Ĭlick the plus sign to expand the Tables folder.Ĭlick the plus sign to expand the table in which you want to update the statistic.Ĭlick the plus sign to expand the Statistics folder. Using SQL Server Management Studio To update a statistics object If using sp_updatestats, requires membership in the sysadmin fixed server role, or ownership of the database ( dbo). If using UPDATE STATISTICS or making changes through SQL Server Management Studio, requires ALTER permission on the table or view. UPDATE STATISTICS can use tempdb to sort the sample of rows for building statistics. The specific tradeoffs depend on your application. We recommend not updating statistics too frequently because there is a performance tradeoff between improving query plans and the time it takes to recompile queries. However, updating statistics causes queries to recompile. Updating statistics ensures that queries compile with up-to-date statistics. By default, the query optimizer already updates statistics as necessary to improve the query plan in some cases you can improve query performance by using UPDATE STATISTICS or the stored procedure sp_updatestats to update statistics more frequently than the default updates. You can update query optimization statistics on a table or indexed view in SQL Server by using SQL Server Management Studio or Transact-SQL.
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