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sys.stats (Transact-SQL)

Contains a row for each statistics object that exists for the tables, indexes, and indexed views in the database in SQL Server. Every index will have a corresponding statistics row with the same name and ID (index_id = stats_id), but not every statistics row has a corresponding index.

The catalog view sys.stats_columns provides statistics information for each column in the database. For more information about statistics, see Statistics.

Applies to: SQL Server (SQL Server 2008 through current version), Windows Azure SQL Database (Initial release through current release).

Column name

Data type

Description

object_id

int

ID of the object to which these statistics belong.

name

sysname

Name of the statistics. Is unique within the object.

stats_id

int

ID of the statistics. Is unique within the object.

auto_created

bit

Indicates whether the statistics were automatically created by SQL Server.

0 = Statistics were not automatically created by SQL Server.

1 = Statistics were automatically created by SQL Server.

user_created

bit

Indicates whether the statistics were created by a user.

0 = Statistics were not created by a user.

1 = Statistics were created by a user.

no_recompute

bit

Indicates whether the statistics were created with the NORECOMPUTE option.

0 = Statistics were not created with the NORECOMPUTE option.

1 = Statistics were created with the NORECOMPUTE option.

has_filter

bit

0 = Statistics do not have a filter and are computed on all rows.

1 = Statistics have a filter and are computed only on rows that satisfy the filter definition.

filter_definition

nvarchar(max)

Expression for the subset of rows included in filtered statistics.

NULL = Non-filtered statistics.

is_temporary

bit

Indicate whether the statistics is temporary. Temporary statistics support AlwaysOn Availability Groups secondary databases that are enabled for read-only access.

0 = The statistics is not temporary.

1 = The statistics is temporary.

Applies to: SQL Server 2012 through SQL Server 2014.

is_incremental

bit

Indicate whether the statistics are created as incremental statistics.

0 = The statistics are not incremental.

1 = The statistics are incremental.

Applies to: SQL Server 2014 through SQL Server 2014.

The visibility of the metadata in catalog views is limited to securables that a user either owns or on which the user has been granted some permission. For more information, see Metadata Visibility Configuration.

The following examples returns all the statistics and statistics columns for the HumanResources.Employee table.

USE AdventureWorks2012;
GO
SELECT s.name AS statistics_name
      ,c.name AS column_name
      ,sc.stats_column_id
FROM sys.stats AS s
INNER JOIN sys.stats_columns AS sc 
    ON s.object_id = sc.object_id AND s.stats_id = sc.stats_id
INNER JOIN sys.columns AS c 
    ON sc.object_id = c.object_id AND c.column_id = sc.column_id
WHERE s.object_id = OBJECT_ID('HumanResources.Employee');

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