[PGS] 가격대 별 상품 개수 구하기

문제

예시

내 풀이

SELECT TRUNC(PRICE / 10000) * 10000 AS PRICE_GROUP, COUNT(PRODUCT_ID) AS PRODUCTS
FROM PRODUCT
GROUP BY TRUNC(PRICE / 10000) * 10000
ORDER BY TRUNC(PRICE / 10000) * 10000;