MySQL select coordinates within range

Question

I\'ve in my database 100 000 addresses (that is records).

Each one of them has its own coordinates (latitude and longitude).

Now, given the geo location of

Answer 1

I would think MySQL's geo spatial extensions would solve this for you: http://dev.mysql.com/doc/refman/5.7/en/gis-introduction.html

Otherwise you could index on lattitude then query WHERE lattitude > userLat-5miles and lattitude < userLat+5miles. That would massively reduce the number of possible rows to process in the application layer.