ID: Q169051
The information in this article applies to:
The sp_fkey stored procedure only returns information about columns explicitly defined by ALTER TABLE or CREATE TABLE with a FOREIGN KEY constraint, and not for columns identified by sp_foreignkey. The sp_foreignkey stored procedure was last supported in SQL Server 4.21a, and is only provided for backwards compatibility with later systems. The use of sp_foreignkey was made unnecessary with the implementation of declarative referential integrity (DRI) in SQL Server 6.0.
For more detailed information, see the following article in the Microsoft Knowledge Base:
   ARTICLE-ID: Q133177
   TITLE     : INF: Changes to SQL Server 6.0 That May Affect 4.2x Apps
Additional query words: sp_fkeys
Keywords          : kbusage SSrvGen 
Version           : 6.0 6.5
Platform          : WINDOWS
Issue type        : kbinfoLast Reviewed: May 29, 1997