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Home -> Community -> Usenet -> comp.databases.theory -> Re: Demo: Modelling Cost of Travel Paths Between Towns

Re: Demo: Modelling Cost of Travel Paths Between Towns

From: Alan <not.me_at_rcn.com>
Date: Sun, 5 Dec 2004 14:28:50 -0500
Message-ID: <31h5tjF3bl4j9U1@individual.net>

"Neo" <neo55592_at_hotmail.com> wrote in message news:4b45d3ad.0412051030.1c3fb2a7_at_posting.google.com...
> > [Neo] destroys his own credibility ... by his failure to
> > understand the difference between a model and its implementation.
>
> Could you precisely state which difference between model and
> implementation that Neo fails to understand? If possible, could you
> illustrate your point with a simple db example?
>
> > [Neo] has proven himself entirely unable to understand
> > anything anyone says to him.
>
> Could you give a precise example of Neo not understanding anything?
> If possible, could you illustrate your point with a simple db example?

Here is a perfect DB example (Oracle) using SQL, answering both of the above:

CREATE TABLE neo
(
knowledge_id NUMBER PRIMARY KEY,
understands_anything_about VARCHAR2(2000) NOT NULL )
;

INSERT INTO neo
VALUES(1,'Knowledgeof model vs. implementation as explained by other usenet message posters.')
;

1 row created.

SELECT *
FROM neo
WHERE neo.understands_anything_about IS NULL ;

no rows returned. Received on Sun Dec 05 2004 - 13:28:50 CST

Original text of this message

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