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

On 5 tra, 03:23, "James K. Lowden" <jklow..._at_speakeasy.net> wrote:
> On Wed, 4 Apr 2012 16:06:47 -0700 (PDT)
>
> vldm10 <vld..._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

I have not mentioned the DBMS. Please note that the db is very different from the DBMS. Note also that the db is different from the data model. So take time for yourself and clarify basic concepts. Then, I hope, you will understand what it is "a real world application". Received on Fri Apr 06 2012 - 15:00:56 CEST