sp_updatestats (Transact-SQL)

مقالة
05/16/2013

Runs UPDATE STATISTICS against all user-defined and internal tables in the current database.

For more information about UPDATE STATISTICS, see UPDATE STATISTICS (Transact-SQL). For more information about statistics, see Statistics.

Topic link icon Transact-SQL Syntax Conventions

Syntax

sp_updatestats [ [ @resample = ] 'resample']

Return Code Values

0 (success) or 1 (failure)

Arguments

[ @resample =] 'resample'
Specifies that sp_updatestats will use the RESAMPLE option of the UPDATE STATISTICS statement. If 'resample' is not specified, sp_updatestats updates statistics by using the default sampling. resample is varchar(8) with a default value of NO.

Remarks

sp_updatestats executes UPDATE STATISTICS, by specifying the ALL keyword, on all user-defined and internal tables in the database. sp_updatestats displays messages that indicate its progress. When the update is completed, it reports that statistics have been updated for all tables.

sp_updatestats updates statistics on disabled nonclustered indexes and does not update statistics on disabled clustered indexes.

sp_updatestats updates only the statistics that require updating based on the rowmodctr information in the sys.sysindexes catalog view, thus avoiding unnecessary updates of statistics on unchanged rows.

sp_updatestats can trigger a recompile of stored procedures or other compiled code. However, sp_updatestats might not cause a recompile, if only one query plan is possible for the tables referenced and the indexes on them. A recompilation would be unnecessary in these cases even if statistics are updated.

For databases with a compatibility level below 90, executing sp_updatestats does not preserve the latest NORECOMPUTE setting for specific statistics. For databases with a compatibility level of 90 or higher, sp_updatestats does preserves the latest NORECOMPUTE option for specific statistics. For more information about disabling and re-enabling statistics updates, see Statistics.

Permissions

Requires membership in the sysadmin fixed server role, or ownership of the database (dbo).

Examples

The following example updates the statistics for tables in the AdventureWorks2012 database.

USE AdventureWorks2012;
GO
EXEC sp_updatestats;

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