Create weather_observation_station_19.sql

Author: erjan

hackerrank_sql_practice/weather_observation_station_19.sql

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+/*
+Consider (a,c) and (b,d)  to be two points on a 2D plane where (a,b) are the 
+respective minimum and maximum values of Northern Latitude (LAT_N) and (c,d) are the respective minimum and maximum values of Western Longitude (LONG_W) in
+*/
+
+select round(sqrt(power((b - a),2) + power((d-c),2)) ,4) from (
+select 
+min(LAT_N) as a, max(LAT_N) as b,
+min(LONG_W)as c, max(LONG_W) as d
+from station)k