---
title: "sys.sysforeignkeys (Transact-SQL) | Microsoft Docs"
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ms.date: "03/15/2017"
ms.prod: sql
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  - "sysforeignkeys"
  - "sys.sysforeignkeys"
  - "sys.sysforeignkeys_TSQL"
  - "sysforeignkeys_TSQL"
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  - "TSQL"
helpviewer_keywords: 
  - "sysforeignkeys system table"
  - "sys.sysforeignkeys compatibility view"
ms.assetid: 41544236-1c46-4501-be88-18c06963b6e8
author: "rothja"
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---
# sys.sysforeignkeys (Transact-SQL)
[!INCLUDE[tsql-appliesto-ss2008-xxxx-xxxx-xxx-md](../../includes/tsql-appliesto-ss2008-xxxx-xxxx-xxx-md.md)]

  Contains information about the FOREIGN KEY constraints that are in the definitions of tables in the database.  
  
> [!IMPORTANT]  
>  [!INCLUDE[ssnoteCompView](../../includes/ssnotecompview-md.md)]  
  
|Column name|Data type|Description|  
|-----------------|---------------|-----------------|  
|**constid**|**int**|ID of the FOREIGN KEY constraint.|  
|**fkeyid**|**int**|Object ID of the table with the FOREIGN KEY constraint.|  
|**rkeyid**|**int**|Object ID of the table referenced in the FOREIGN KEY constraint.|  
|**fkey**|**smallint**|ID of the referencing column.|  
|**rkey**|**smallint**|ID of the referenced column.|  
|**keyno**|**smallint**|Position of the column in the reference column list.|  
  
## See Also  
 [Mapping System Tables to System Views (Transact-SQL)](../../relational-databases/system-tables/mapping-system-tables-to-system-views-transact-sql.md)   
 [Compatibility Views (Transact-SQL)](~/relational-databases/system-compatibility-views/system-compatibility-views-transact-sql.md)