[HackerRank] Weather Observation Station 9_LIKE

문제

Query the list of CITY names from STATION that do not start with vowels. Your result cannot contain duplicates.

Input Format

The STATION table is described as follows:

where LAT_N is the northern latitude and LONG_W is the western longitude.

 

풀이

-- LEFT
SELECT DISTINCT CITY
FROM STATION
WHERE LEFT(CITY, 1) NOT IN ('a', 'e', 'i', 'o', 'u');

-- REGEXP
SELECT DISTINCT CITY
FROM STATION
WHERE CITY REGEXP "^[^aeiou]";

-- LIKE
SELECT DISTINCT(CITY)
FROM STATION
WHERE CITY NOT LIKE 'a%'
    AND CITY NOT LIKE 'e%' 
    AND CITY NOT LIKE 'i%'
    AND CITY NOT LIKE 'o%'
    AND CITY NOT LIKE 'u%';

 

배운점

추가 조건 작성 시, 칼럼 다시 적는거 잊지 말기!
WHERE 칼럼 NOT LIKE '조건'
     AND 칼럼 NOT LIKE '조건'
     ...