DROP PROCEDURE IF EXISTS `bs`.`weekWaste_getDetail`;

DELIMITER $$
$$
CREATE
    DEFINER = root@`%` PROCEDURE `bs`.`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 ;