[GROUP BY/LEVEL3] 즐겨찾기가 가장 많은 식당 정보 출력하기 (MySQL/Oracle)

MySQL/Oracle

SELECT FOOD_TYPE, REST_ID, REST_NAME, FAVORITES
FROM REST_INFO
WHERE (FOOD_TYPE, FAVORITES) IN (    
                                SELECT FOOD_TYPE, MAX(FAVORITES)
                                  FROM REST_INFO
                              GROUP BY FOOD_TYPE )
ORDER BY FOOD_TYPE DESC
;