On Sat, 17 Jul 2004, Véronique   De Laet wrote:

> We have a database with elevation values of contourlines with an 
> aquidistance of 1m. Now we want to select lines with an interval of 
> 5m. 

If you want to select contour lines with elevation values that are even 
multiples of 5m, you can do so like this:

Select * from MyContours where MyElevation mod 5 = 0

- Bill Thoen



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