如何将mysql中最后一行的位置更改为第一行？

Question

my sql query is

SELECT COUNT(*) as count FROM <DB> GROUP BY InputTime ORDER BY InputTime) A GROUP BY HOUR(InputTime) WITH ROLLUP;

And the result is

+-------+
| count |
+-------+
|    62 |
|   200 |
|    10 |
|   272 |
+-------+

Last row is the sum of previous values. How to make last row to first row like this?

+-------+
| count |
+-------+
|   272 |
|    62 |
|   200 |
|    10 |
+-------+

Answer 1

I'd select the hour(inputtime) too, and order by it. The roll up line will have a null for it and nulls sort first.

Answer 2

Perhaps something like this:

SELECT IFNULL(hours,'Total'), count
FROM
(SELECT HOUR(InputTime) hours, COUNT(*) AS count 
FROM DBname where InputTime>= '2021-07-07' AND InputTime <='2021-07-07 23:56:59' GROUP BY HOUR(InputTime) WITH ROLLUP) V
ORDER BY hours ASC;

Since the ROLLUP returned NULL for hours column in the subquery, the ORDER BY hours in the outer query will put it on top. " .. In MySQL NULL values are considered lower than any non-NULL value, therefore, NULL values appear first when the order is ASC (ascending), and ordered last when the order is DESC (descending) .. " ( https://www.designcise.com/web/tutorial/how-to-order-null-values-first-or-last-in-mysql )

Demo fiddle