[프로그래머스 SQL고득점 키트 JOIN]상품 별 오프라인 매출 구하기

SELECT PRODUCT_CODE ,SUM(PRICE* SALES_AMOUNT) AS SALES
FROM 
PRODUCT P
JOIN 
OFFLINE_SALE O
ON P.PRODUCT_ID = O.PRODUCT_ID
Group by product_code
ORDER BY SALES DESC, PRODUCT_CODE;