Re: does a table always need a PK?

"Morten Gulbrandsen" <Morten.Gulbrandsen_at_rwth-aachen.de> wrote in message news:60ca69db.0309010209.7fe7c330_at_posting.google.com...
> Leandro

GuimarÃfÂfÃ,ÂfÃfÂ,Ã,ÂfÃfÂfÃ,Â,ÃfÂ,Ã,ÂfÃfÂfÃ,ÂfÃfÂ,Ã,Â,ÃfÂfÃ,Â,ÃfÂ,Ã,£es 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?/data base
>
> Then I'd like to investigate D&D's _TTM_, whatever it is.

D&D are C.J. Date and Hugh Darwen. _TTM_ is an acronym for "The Third Manifesto" or more completely: _Foundation for Object/Relational Databases, The Third Manifesto_ Received on Mon Sep 01 2003 - 15:36:07 CEST