"HR-SQL Weather Observation Station 18"의 두 판 사이의 차이

2018년 8월 16일 (목) 17:04 판

1 개요

HR-SQL Weather Observation Station 18

https://www.hackerrank.com/challenges/weather-observation-station-18/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(c-a+d-b, 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;
# 259.6859

SELECT ROUND(
    (SELECT MAX(LAT_N) FROM STATION)
    -(SELECT MIN(LAT_N) FROM STATION)
    +(SELECT MAX(LONG_W) FROM STATION)
    -(SELECT MIN(LONG_W) FROM STATION)
, 4);
# 259.6859

@@ 8번째 줄: / 8번째 줄: @@
 ==MySQL==
+<source lang='mysql'>
+SELECT ROUND(c-a+d-b, 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;
+# 259.6859
+</source>
 <source lang='mysql'>
 SELECT ROUND(
@@ 15번째 줄: / 25번째 줄: @@
      -(SELECT MIN(LONG_W) FROM STATION)
 , 4);
+# 259.6859
 </source>