get all users who live in downtown Boston using lat/lng

SQL statement for Postgres:

            

              Copy
            
            SELECT
  *
FROM
  users
WHERE
  ST_DWithin (
    users.location,
    ST_SetSRID (ST_MakePoint (-71.0596, 42.3601), 4326),
    1000
  );
          

Explanation:

• The SELECT statement is used to retrieve data from the users table.
• The ST_DWithin function is used to find users whose location is within a certain distance from a given point.
• The users.location column represents the location of each user in the table.
• The ST_SetSRID function is used to set the spatial reference system identifier (SRID) for the given point.
• The ST_MakePoint function is used to create a point with the specified latitude and longitude coordinates.
• The -71.0596 and 42.3601 values represent the longitude and latitude coordinates of downtown Boston, respectively.
• The 4326 value is the SRID for the WGS 84 coordinate system, which is commonly used for representing latitudes and longitudes.
• The 1000 value represents the distance in meters within which we want to find users.