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Home -> Community -> Usenet -> comp.databases.theory -> Re: How to represent a total-and-exclusive relation into a relational database

Re: How to represent a total-and-exclusive relation into a relational database

From: Mark D Powell <Mark.Powell_at_eds.com>
Date: 19 Jan 2005 12:36:39 -0800
Message-ID: <1106166999.904249.189350@z14g2000cwz.googlegroups.com> 





Mathieu, Celko created the UK on the PK + another attribute, in this
case, vehicle_type because his design calls for creating a table for
each vehicle type and he want a FK from the vehicle type tables back to
the parent for referential integrity.



HTH -- Mark D Powell --
Received on Wed Jan 19 2005 - 14:36:39 CST












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