문제 link
https://www.hackerrank.com/challenges/weather-observation-station-13/problem
Code link
https://github.com/JamesJung01/Hackerrank_sql/blob/main/01_Easy/Weather_Observation_Stations13.sql
SELECT TRUNCATE(SUM(LAT_N),4) FROM STATION WHERE LAT_N > 38.7880 AND LAT_N < 137.2345;