HR-SQL Weather Observation Station 19

1 개요

HR-SQL Weather Observation Station 19

• https://www.hackerrank.com/challenges/weather-observation-station-19/problem

해커랭크 SQL

문제	DB2	MS SQL	MySQL	Oracle
HR-SQL Aggregation e
HR-SQL Revising Aggregations - The Count Function
HR-SQL Revising Aggregations - The Sum Function
HR-SQL Revising Aggregations - Averages
HR-SQL Average Population
HR-SQL Japan Population
HR-SQL Population Density Difference
HR-SQL The Blunder
HR-SQL Top Earners
HR-SQL Weather Observation Station 2
HR-SQL Weather Observation Station 13
HR-SQL Weather Observation Station 14
HR-SQL Weather Observation Station 15
HR-SQL Weather Observation Station 16
HR-SQL Weather Observation Station 17
HR-SQL Weather Observation Station 18
HR-SQL Weather Observation Station 19
HR-SQL Weather Observation Station 20

2 MySQL

SELECT ROUND( SQRT(POW(a-c,2)+POW(b-d,2)), 4 )
FROM (
    SELECT
    MIN(LAT_N) AS a, MIN(LONG_W) AS b,
    MAX(LAT_N) AS c, MAX(LONG_W) AS d
    FROM STATION
) t;
# 184.1616

SELECT ROUND(SQRT(
POW(
    (SELECT MAX(LAT_N) FROM STATION) - (SELECT MIN(LAT_N) FROM STATION)
,2)
+POW(
    (SELECT MAX(LONG_W) FROM STATION) - (SELECT MIN(LONG_W) FROM STATION)
,2)
), 4);
# 184.1616