如何将SQL结果从小索引到大索引排序？

Question

I have a database that is sorted by ID. I want to echo out the 3 rows with the biggest id number but have them echoed out as

id = 5
id = 6
id = 7

as opposed to how

SELECT * FROM `userinfo`ORDER BY `id` ASC LIMIT 3;

will echo out

id = 7
id = 6
id = 5

in PHP

Answer 1

Use a derived table for limiting the result and sort again in the outer query.

SELECT *
       FROM (SELECT *
                    FROM `userinfo`
                    ORDER BY `id` DESC
                    LIMIT 3) x
       ORDER BY `id` ASC;