hello to all,
i have (actually will have) a table in my Db with data of thousands of
stores across
the USA, each one containing zip code.
right now, when searching for "a store near you" i go through the Db
store by store and use a distance between points function  (uses lat
lng data) to locate the stores which are in radius X around the user's
address.
my question - is there a way to use the zip info so i can use the sql
query to retrieve only a portion of the stores, say from a given state
or county. then i would have to use the function on less stores. i
have a "state" field as well but this can be tricky
if the users lives close to state borders and the store is just across
the border in another state. also, in a city like LA or NY i might
have hundreds of stores.

the idea (if possible..) is that if a have a "base" zip of say 666 i
could do
WHERE zip BETWEEN 666+100 and 66-100
and get filtered results.

thanx in advance  for any attempt to help :-)

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