sys-sysconstraints-transact-sql.md

title	sys.sysconstraints (Transact-SQL) | Microsoft Docs
ms.custom
ms.date	03/15/2017
ms.prod	sql
ms.prod_service	database-engine
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ms.technology	system-objects
ms.topic	language-reference
f1_keywords	sysconstraints sys.sysconstraints sysconstraints_TSQL sys.sysconstraints_TSQL
dev_langs	TSQL
helpviewer_keywords	sys.sysconstraints compatibility view sysconstraints system table
ms.assetid	f2b2e2ad-ba24-48a1-913c-8ee4e0895dc4
author	rothja
ms.author	jroth

sys.sysconstraints (Transact-SQL)

[!INCLUDEtsql-appliesto-ss2012-xxxx-xxxx-xxx-md]

Contains mappings of constraints to the objects that own the constraints within the database.

Important

[!INCLUDEssnoteCompView]

Column name	Data type	Description
constid	int	Constraint number.
id	int	ID of the table that owns the constraint.
colid	smallint	ID of the column on which the constraint is defined. 0 = Table constraint
spare1	tinyint	Reserved
status	int	Pseudo-bit-mask indicating the status. Possible values include the following: 1 = PRIMARY KEY constraint 2 = UNIQUE KEY constraint 3 = FOREIGN KEY constraint 4 = CHECK constraint 5 = DEFAULT constraint 16 = Column-level constraint 32 = Table-level constraint
actions	int	Reserved
error	int	Reserved

See Also

Mapping System Tables to System Views (Transact-SQL)
Compatibility Views (Transact-SQL)