HACKERRANK 3일차

Weather Observation Station 8

SELECT DISTINCT CITY 
FROM STATION 
WHERE CITY REGEXP '^[aeiou]' AND CITY REGEXP '[aeiou]$'

Weather Observation Station 9

SELECT DISTINCT CITY
FROM STATION
WHERE CITY NOT REGEXP '^[aeiou]';

NOT을 한 번 붙여봤는데 성공했다!

Weather Observation Station 10

SELECT DISTINCT CITY
FROM STATION
WHERE CITY NOT REGEXP '[aeiou]$'