Re: The Practical Benefits of the Relational Model

From: Lauri Pietarinen <lauri.pietarinen_at_atbusiness.com>
Date: Thu, 03 Oct 2002 09:28:18 +0300
Message-ID: <3D9BE382.A470F58C@atbusiness.com>

David Cressey wrote:

> Don't expect people to stop saying that "A real relational system has never
> been implemented". You will just be disappointed.

Strangely enough, a "real" relational system _has_ been implemented - and that was a long time ago. See

http://www.mcjones.org/System_R/bs12.html

Obviously SQL does not even _try_ to be relational, and never has tried to. I am referring here to the fact that result tables can have duplicate rows.

By the way, the SQL1999-standard does not even mention the word "relational".

Lauri

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 Lauri Pietarinen, Senior Consultant, Databases

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Received on Thu Oct 03 2002 - 01:28:18 CDT