SUBSTRING(l.zipcode, 1, 2) AS city_id,
ROUND(AVG(l2.latitude), 6) AS city_latitude,
ROUND(AVG(l2.longitude), 6) AS city_longitude
SUBSTRING(l.zipcode, 1, 2) AS city_id,
ROUND(AVG(l2.latitude), 6) AS city_latitude,
ROUND(AVG(l2.longitude), 6) AS city_longitude