Re: Navigation vs Relational operators

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"Ken North" <knorth2_at_deletethis.yahoo.com> wrote in message news:c88knd$mc9$1_at_ngspool-d02.news.aol.com...
> > In what way is "navigation" different from using relational operators ?

> 3. Relational is non-navigational. You don't need to know how to navigate
to the
> data that matches your search criteria.
>
> If you tell a taxi driver "Take Hwy 163 north to Interstate 8. Turn west
on
> Interstate 8 until you come to Interstate 5. Turn North on Interstate 5
until
> the split at Interstate 405. Take I-405 North until you get to the West
Century
> Blvd. exit. Turn west and take West Century Blvd. to Los Angeles Airport".
> That's navigation.
>
> On the other hand, if you say "Take me to Los Angeles Airport", that's
SQL. You
> rely on the driver to know the best route.

I think Relational is more like using a subway or railway system rather than a taxi.

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