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Re: does a table always need a PK?

From: Morten Gulbrandsen <Morten.Gulbrandsen_at_rwth-aachen.de>
Date: 1 Sep 2003 03:09:44 -0700
Message-ID: <60ca69db.0309010209.7fe7c330_at_posting.google.com> 






Leandro Guimarães Faria Corsetti Dutra <lgcdutra_at_terra.com.br> wrote in message news:<pan.2003.08.26.15.14.06.524358_at_terra.com.br>...



[snip]


> 

> 	In any way, Codd's work is somewhat obsolete.  I'd look to D&D's _TTM_.





[snip]



    
  
  1.   D&D   Who is it ?  which paper, book or whatever please ?
  
  2.   TTM   Pardon ? TT Model  ?  






Please help me, I am not _that_ familiar to Database nomenclature.



I think the first ones are some famous Authors of some database textbook. 
C.J. Date + ???



I hope the second acronym could be a natural development 
of extreme programming,


Object Oriented Programming,


Relational Database management system,


Entity Relationship 



or something comparable, but not similar.



If the excellent work from Dr. Edgar F. Codd is "somewhat obsolete",
URL



http://www.intelligententerprise.com/online_only/features/030425.shtml?/database



Then I'd like to investigate  D&D's _TTM_, whatever it is.





Yours Sincerely



Morten Gulbrandsen
Received on Mon Sep 01 2003 - 12:09:44 CEST












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