从sql查询中删除默认排序

Question

我希望将记录按照查询中的顺序排序：

SELECT `month`, SUM(order_quantity) AS order_quantity FROM" +
            "(  SELECT MONTH(date_livraison) AS month,         COUNT(*) AS order_quantity  FROM" +
            " bon_livraison    GROUP BY MONTH(date_livraison)    UNION ALL      " +
            "SELECT MONTH(DATE_SUB(NOW(), INTERVAL 12 MONTH)) AS month, 0 order_quantity      UNION ALL     " +
            " SELECT MONTH(DATE_SUB(NOW(), INTERVAL 11 MONTH)) AS month, 0 order_quantity     UNION ALL  " +
            "   SELECT MONTH(DATE_SUB(NOW(), INTERVAL 10 MONTH)) AS month, 0 order_quantity     UNION ALL  " +
            "   SELECT MONTH(DATE_SUB(NOW(), INTERVAL 9 MONTH)) AS month, 0 order_quantity    UNION ALL  " +
            "  SELECT MONTH(DATE_SUB(NOW(), INTERVAL 8 MONTH)) AS month, 0 order_quantity     UNION ALL  " +
            "   SELECT MONTH(DATE_SUB(NOW(), INTERVAL 7 MONTH)) AS month, 0 order_quantity     UNION ALL  " +
            "   SELECT MONTH(DATE_SUB(NOW(), INTERVAL 6 MONTH)) AS month, 0 order_quantity     UNION ALL   " +
            "  SELECT MONTH(DATE_SUB(NOW(), INTERVAL 5 MONTH)) AS month, 0 order_quantity     UNION ALL    " +
            " SELECT MONTH(DATE_SUB(NOW(), INTERVAL 4 MONTH)) AS month, 0 order_quantity     UNION ALL    " +
            " SELECT MONTH(DATE_SUB(NOW(), INTERVAL 3 MONTH)) AS month, 0 order_quantity     UNION ALL   " +
            "  SELECT MONTH(DATE_SUB(NOW(), INTERVAL 2 MONTH)) AS month, 0 order_quantity     UNION ALL  " +
            "   SELECT MONTH(DATE_SUB(NOW(), INTERVAL 1 MONTH)) AS month, 0 order_quantity ) a GROUP BY `month` ORDER BY `month`

但总是我有1 ...... 12

你知道吗

************************** EDIT

这是我放order by 'month desc'或添加新列的结果，并且我按照它排序：

如果你看，问题是order_quantity的顺序具有第一优先级