[해커랭크(HackerRank) SQL 풀이] - Weather Observation Station 10

해커 랭크 - https://www.hackerrank.com/
Prepare > SQL > Basic Select > Weather Observation Station 10

 

HackerRank - Online Coding Tests and Technical Interviews

 

 

STATION에서 모음으로 끝나지 않는 CITY 이름을 조회합니다.

중복된 결과가 포함되지 않아야 합니다.

 

Input Format

STATION 테이블은 다음과 같이 설명됩니다.

[출처] https://www.hackerrank.com/challenges/weather-observation-station-10/problem

 

여기서 LAT_N은 북위, LONG_W는 서경입니다.

 

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MySQL

SELECT  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')
GROUP BY CITY;

 

Oracle

SELECT  CITY
FROM    STATION
WHERE   (LOWER(CITY) NOT LIKE '%a'
         AND LOWER(CITY) NOT LIKE '%e'
         AND LOWER(CITY) NOT LIKE '%i'
         AND LOWER(CITY) NOT LIKE '%o'
         AND LOWER(CITY) NOT LIKE '%u')
GROUP BY CITY;

 

MS SQL Server

SELECT  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')
GROUP BY CITY;

 

 

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• MySQL과 MSSQL의 경우 NOT LIKE 조건 검색 시 대소문자 구분 따로 없어도 조회 가능.
• ORACLE의 경우 NOT LIKE 조건 검색 시 대소문자 구분 필요함. 여기서는 소문자로 치환하여 조회함.

 

• 대문자로 치환하여 검색 시 : UPPER()
• 소문자로 치환하여 검색 시 : LOWER()

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