Re: Counterquestion - is Oracle a He or a She - or an It or a hermaphrodite
- From: "Leandro Guimaraes Faria C. Dutra" <ldutra@xxxxxxxxxxxxx>
- To: niall.litchfield@xxxxxxxxx
- Date: Mon, 8 Aug 2005 09:34:25 -0300
oracle-l-bounce@xxxxxxxxxxxxx gravou em 2005-08-08 09:27:29:
> Isn't this a great example of how a better design is a better solution?
> Wouldn't
>
> PATIENT
> =======
> PATIENT_PK
> ....................
>
> ALLERGEN
> =========
> ALLERGEN_PK
> ........................
>
> KNOWN_ALLERGIES
> ================
> PATIENT_PK -- foreign key
> ALLERGEN_PK -- foreign key
> IDENTIFIED_DATE
> .....
>
>
> Be a better design?
I know it's just a rethorical question, but I couldn't avoid
answering: yes!
As usual, complexity is better avoided by trying to reach the
essentials, not by adding layers -- this being one of the reasons why OO
is doomed as a DBMS approach. For example, most NULLs can be dispensed by
good modelling in general (and full normalisation in particular), and many
triggers can be avoided by creating an equivalent but far simpler
constraint. That's part of the reasons why SQL is ultimately doomed and
we should all be thinking about using relational systems.
--
Leandro Guimarães Faria Corcete DUTRA
Administrador de Bases de Dados +55 (11) 4390 5383
Toyota do Brasil Ltda ldutra@xxxxxxxxxxxxx
São Bernardo do Campo, SP BRASIL
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