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DevHyun
Weather Observation Station 3
www.hackerrank.com/domains/sql Query a list of CITY names from STATION for cities that have an even ID number. Print the results in any order, but exclude duplicates from the answer. The STATION table is described as follows: where LAT_N is the northern latitude and LONG_W is the western longitude. 짧은 영어실력으로 번역하자면.. STATION 테이블의 CITY 필드를 추출해 내는 것이 목표이고, 조건은 ID가 EVEN(짝수) 일 것. 정렬 순서는 상관없고 중복제거 MSS..
SQL/HACKERRANK
2020. 10. 29. 13:58