자동차 평균 대여 기간 구하기

문제

코드

SELECT CAR_ID, ROUND(AVG(DATEDIFF(END_DATE, START_DATE)+1),1) AS AVERAGE_DURATION
FROM CAR_RENTAL_COMPANY_RENTAL_HISTORY
GROUP BY CAR_ID
HAVING AVG(DATEDIFF(END_DATE, START_DATE)+1)>=7
ORDER BY AVERAGE_DURATION DESC, CAR_ID DESC;

 

출처: 프로그래머스 코딩 테스트 연습, https://school.programmers.co.kr/learn/courses/30/lessons/157342