SELECT 56 AS city1_id, A.city_id AS city2_id, B.distance, B.duration, A.city_latitude, A.city_longitude FROM tbl_city A 
LEFT JOIN tbl_distance B ON (A.city_id = B.city1_id AND B.city2_id = 56) OR (A.city_id = B.city2_id AND B.city1_id = 56) 
WHERE parent_id = 56 AND city_id != 779 ORDER BY A.city_name