Choose Category
SELECT PRODUCT_ID, YEAR, SUM(PRICE) FROM SALES GROUP BY PRODUCT_ID, YEAR ORDER BY PRODUCT_ID, YEAR;
SELECT PRODUCT_ID, YEAR, SUM(PRICE) FROM SALES GROUP BY ROLLUP(PRODUCT_ID, YEAR) ORDER BY PRODUCT_ID, YEAR;
SELECT PRODUCT_ID, YEAR, SUM(PRICE) FROM SALES GROUP BY PRODUCT_ID, ROLLUP(YEAR) ORDER BY PRODUCT_ID, YEAR;