sys.stats (Transact-SQL)

Applies to: yesSQL Server (all supported versions) YesAzure SQL Database YesAzure SQL Managed Instance yesAzure Synapse Analytics yesParallel Data Warehouse

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.

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.

If statistics correspond to an index, the stats_id value is the same as the index_id value in the sys.indexes catalog view.
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 Applies to: SQL Server 2012 (11.x) and later.

Indicate whether the statistics is temporary. Temporary statistics support Always On availability groups secondary databases that are enabled for read-only access.

0 = The statistics is not temporary.

1 = The statistics is temporary.
is_incremental bit Applies to: SQL Server 2014 (12.x) and later.

Indicate whether the statistics are created as incremental statistics.

0 = The statistics are not incremental.

1 = The statistics are incremental.

Permissions

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.

Examples

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');

See Also

Object Catalog Views (Transact-SQL)
Catalog Views (Transact-SQL)
Querying the SQL Server System Catalog FAQ
Statistics
sys.dm_db_stats_properties (Transact-SQL)
sys.dm_db_stats_histogram (Transact-SQL)
sys.stats_columns (Transact-SQL)