Select coordinates which fall within a radius of a central point?

I have a database of coordinates in the schema:


I’ve set up my google maps application to show the markers effectively on the screen. However I need to add another feature whereby the user can view all pointers that fall within the radius from a central point.

How would I write up a sql statement of the kind:

Select all pointers that fall within a 10 mile radius of X & Y

Train Asked on 06/09/2014 in Technology.
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