regxone.com/lesson/introdution_abcs. >>> 연습사이트 regxr.com Weather Observation Station 6 https://www.hackerrank.com/challenges/weather-observation-station-6/problem?h_r=internal-search 기존 풀이 SELECT DISTINCT city FROM station WHERE city LIKE 'a%' OR city LIKE 'e%' OR city LIKE 'i%' OR city LIKE 'o%' OR city LIKE 'u%' -------------------------------------------------------------------------------- 정..