sys.key_constraints (Transact-SQL)

Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) Warehouse in Microsoft Fabric SQL database in Microsoft Fabric

Contains a row for each object that is a primary key or unique constraint. Includes sys.objects.type PK and UQ.

Column name	Data type	Description
<Columns inherited from sys.objects>		For a list of columns that this view inherits, see sys.objects (Transact-SQL).
unique_index_id	int	ID of the corresponding unique index in the parent object that was created to enforce this constraint.
is_system_named	bit	1 = Name was generated by system. 0 = Name was supplied by the user.

Permissions

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

See Also

Object Catalog Views (Transact-SQL)
Catalog Views (Transact-SQL)
Querying the SQL Server System Catalog FAQ