Database Reference
In-Depth Information
So far, our approach to answering this question is to limit the search using the
ST_DWithin operator to only search for records within a certain distance.
ST_DWithin usesourspatialindex,sotheinitialdistancesearchisfastandthelist
ofreturnedrecordsshouldbeshortenoughtodothesamepair-wisedistancecom-
parisonwedidearlierinthissection.Inourcasehere,wecouldlimitthesearchto
within 200 feet as follows.
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