[SQL문제풀기] 노선별 평균 역 사이 거리 조회하기

문제

MYSQL

내가 작성한 정답

SELECT ROUTE, 
        CONCAT(ROUND(SUM(D_BETWEEN_DIST),1),'km') TOTAL_DISTANCE, 
        CONCAT(ROUND(AVG(D_BETWEEN_DIST),2),'km') AVERAGE_DISTANCE
FROM SUBWAY_DISTANCE
GROUP BY ROUTE
ORDER BY 2 DESC