修改或排序WITH ROLLUP行

Question

如果使用WITH ROLLUP，是否可以对最早的日期进行排序？ 这是一个例子：

SELECT id, DATEDIFF(NOW(), date) as date, sum(qty) as qty FROM item group by id WITH ROLLUP

会给我这个：

+-----------------------+
| ID     | DAYS   | QTY |
+-----------------------+
| 1      | 437    | 17  |
| 2      | 38     | 33  |
| 3      | 14     | 49  |
| (null) | 14     | 99  |
+-----------------------+

但我期待：

+-----------------------+
| ID     | DAYS   | QTY |
+-----------------------+
| 1      | 437    | 17  |
| 2      | 38     | 33  |
| 3      | 14     | 49  |
| (null) | 437    | 99  |
+-----------------------+

我希望在该行上显示最早的日期。有可能吗？

Answer 1

如果您将日期放在聚合函数中，那么您可以执行所需的操作：

SELECT id, max(DATEDIFF(NOW(), date)) as date, sum(qty) as qty
FROM item
group by id WITH ROLLUP;