Sort data (order by) before group by in mysql

Question

I want to group below data from sub_prd_id. but before that i need order data from max created_at.

I wrote query as below.

Answer 1

SELECT x.* 
  FROM prd_data x 
  JOIN 
     ( SELECT sub_prd_id
            , MAX(created_at) max_created_at 
         FROM prd_data 
        GROUP 
           BY sub_prd_id
     ) y 
    ON y.sub_prd_id = x.sub_prd_id 
   AND y.max_created_at = x.created_at;