[programmers] 상품 별 오프라인 매출 구하기

https://school.programmers.co.kr/learn/courses/30/lessons/131533

프로그래머스

SELECT A.PRODUCT_CODE, SUM(A.PRICE*B.SALES_AMOUNT) AS SALES
FROM PRODUCT AS A JOIN OFFLINE_SALE AS B
ON A.PRODUCT_ID = B.PRODUCT_ID
GROUP BY A.PRODUCT_CODE
ORDER BY SALES DESC, PRODUCT_CODE ASC