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목록aggregation (3)
몸과 마음이 건전한 SW 개발자
[HackerRank-MSSQL] 해커랭크 Aggregation Weather Observation Station 14
문제 링크https://www.hackerrank.com/challenges/weather-observation-station-14/problem?isFullScreen=true Weather Observation Station 14 | HackerRankQuery the greatest value of the Northern Latitudes from STATION that are under 137.2345 and truncated to 4 decimal places.www.hackerrank.com정답 코드select top(1) cast(lat_n as decimal(10, 4)) from stationwhere lat_n
[HackerRank-MSSQL] 해커랭크 Aggregation Weather Observation Station 13
문제 링크https://www.hackerrank.com/challenges/weather-observation-station-13/problem?isFullScreen=true Weather Observation Station 13 | HackerRankQuery the sum of Northern Latitudes having values greater than 38.7880 and less than 137.2345, truncated to 4 decimal places.www.hackerrank.com정답 코드SELECT CAST(SUM(LAT_N) AS DECIMAL(10, 4))FROM STATION WHERE LAT_N > 38.7880 AND LAT_N 느낀점MS SQL Server에는 TR..
[HackerRank-MSSQL] 해커랭크 Aggregation Weather Observation Station 2 (Cast, Decimal, Format, Round, N, F)
문제 링크https://www.hackerrank.com/challenges/weather-observation-station-2/problem?isFullScreen=true Weather Observation Station 2 | HackerRankWrite a query to print the sum of LAT_N and the sum of LONG_W separated by space, rounded to 2 decimal places.www.hackerrank.com틀린 코드 1SELECT ROUND(SUM(LAT_N), 2), ROUND(SUM(LONG_W), 2) FROM STATION; 틀린 코드 2SELECT CAST(SUM(LAT_N) AS DECIMAL(10, 2)), CAST(SU..