[프로그래머스][SQL] 물고기 종류 별 잡은 수 구하기

https://school.programmers.co.kr/learn/courses/30/lessons/293257

프로그래머스

 

문제

FISH_NAME_INFO에서 

물고기의 종류 별 물고기의 이름과 잡은 수를 출력하는 SQL문을 작성해주세요.

물고기의 이름 컬럼명은 FISH_NAME, 잡은 수 컬럼명은 FISH_COUNT로 해주세요.

결과는 잡은 수 기준으로 내림차순 정렬해주세요.

 

풀이

FISH_INFO와 FISH_NAME_INFO 를 join 해주고

FISH_NAME으로 group by 해주면 끝

select count(i.ID) as FISH_COUNT, n.FISH_NAME
from FISH_INFO i join FISH_NAME_INFO n on i.FISH_TYPE = n.FISH_TYPE
group by n.FISH_NAME
order by FISH_COUNT desc