Re: Informal Survey #1 -- joins on foreign keys

From: James K. Lowden <jklowden_at_speakeasy.net>
Date: Wed, 4 Apr 2012 21:23:59 -0400
Message-Id: <20120404212359.a70b7965.jklowden_at_speakeasy.net>


On Wed, 4 Apr 2012 16:06:47 -0700 (PDT)
vldm10 <vldm10_at_yahoo.com> wrote:

> However db also
> works with real word objects.

I am not aware of any such DBMS. Every DBMS I've ever seen manages (let us call them) "objects" that are mere software. They are in no way "real world objects". It is the designer's job to define those objects reflective of the real world, and the user's job to maintain the modelled objects such that accurately reflect the real world. Only then is the DBMS able to provide logical inferences from the model that can be meanfully applied to the real world (again, by the user).

--jkl   Received on Thu Apr 05 2012 - 03:23:59 CEST

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