SQL Query for Performing Radius Search based on Latitude Longitude

Question

We have a restaurant table that has lat-long data for each row.

We need to write a query that performs a search to find all restaurants within the prov

Answer 1

You may want to create a SPATIAL index on your table to make the searches faster.

To do this, add a POINT column to your table:

ALTER TABLE restaurant ADD coords POINT NOT NULL;

CREATE SPATIAL INDEX sx_restaurant_coords ON restaurant (coords);

SELECT  *
FROM    restaurant
WHERE   MBRContains(coords, LineString(Point(583734 - 1609, 4507223 - 1609), Point(583734 + 1609, 4507223 + 1609))
        AND GLength(LineString(Point(583734, 4507223), coords)) <= 1609

You should store coords as UTM coordinates within a single zone.