USE `bs`;
DROP procedure IF EXISTS `weekWaste_getDetail`;

DELIMITER $$
USE `bs`$$
CREATE DEFINER=`root`@`%` PROCEDURE `weekWaste_getDetail`()
BEGIN
	DECLARE vLastWeek DATE;
	DECLARE vWeek INT;
    DECLARE vYear INT;
    
    SET vLastWeek = TIMESTAMPADD(WEEK,-1,CURDATE());
    SET vYear = YEAR(vLastWeek);
    SET vWeek = WEEK(vLastWeek, 1);
    
	SELECT *, 100 * dwindle / total AS percentage
		FROM (
			SELECT  buyer,
					ws.family,  
					sum(ws.saleTotal) AS total, 
					sum(ws.saleWaste) AS dwindle
				FROM bs.waste ws
				WHERE year = vYear AND week = vWeek
				GROUP BY buyer, family
			) sub
			ORDER BY percentage DESC;
END$$

DELIMITER ;