두번째 정규표현식 문제입니다.
Query the list of CITY names from STATION which have vowels (i.e., a, e, i, o, and u) as both their first and last characters. Your result cannot contain duplicates.
문제링크
SELECT DISTINCT city
FROM station
WHERE city REGEXP '^[aeiou].*[aeiou]$' -- ^은 시작, $끝 []은 or을 의미함