I'm not sure if I understand your question but I'll try to answer it
just the same.

I have two tables and a view. One has all the dealer info including
zip code. The other table has all the zip codes with their latitude
and longitude. I then join the two tables to make a view named
dealer_geo.

What happens next is I query the view. I create a column named
distance that has the distance in miles from the starting zip code. As
part of my where clause, I only select the records that are less than
or equal to the passed radius.

I hope that helps. :-\


On Fri, 28 Jan 2005 15:00:24 -0500, Ray Thompson <[EMAIL PROTECTED]> wrote:
> OK. But where do you get the information from the database when you are
> selecting? It would appear to me that you need to use the zip code
> information in the records, pass those through the great circle calculation,
> then order the output based on the distance between the two points.
> 
> Ray Thompson
> Tau Beta Pi (www.tbp.org)
> The Engineering Honor Society
> 865-546-4578
>

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