How to group by DESC order

Question

I have the following table called questions:

ID | asker 
1  | Bob
2  | Bob
3  | Marley

I want to select each asker only once and if there are

Answer 1

Normally MySQL allows group by ascending order records only. So we can order records before grouping.

SELECT *
FROM (
  SELECT *
  FROM questions
  ORDER BY id DESC
) AS questions
GROUP BY questions.asker