[HackerRank/SQL] Aggregation - Weather Observation Station 17

Problem. Basic Select - Weather Observation Station 17

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Link.

https://www.hackerrank.com/challenges/weather-observation-station-17/problem?isFullScreen=true 

Weather Observation Station 17 | HackerRank

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Description.

Query the Western Longitude (LONG_W)where the smallest Northern Latitude (LAT_N) in STATION is greater than 38.7780.

Round your answer to 4 decimal places.

 

STATION 테이블

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Key Point. 

ROUND,

 

MIN,

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My Answer. 

SELECT
ROUND(LONG_W, 4)
FROM STATION
WHERE LAT_N = (SELECT MIN(LAT_N) FROM STATION WHERE LAT_N > 38.7780);

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References.