sys.stats (Transact-SQL)
SQL Server Azure SQL Database Azure Synapse Analytics (SQL DW) Parallel 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)
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