How to select the most recent set of dated records from a mysql table

Question

I am storing the response to various rpc calls in a mysql table with the following fields:

Table: rpc_responses

timestamp   (date)
method      (varchar)
id          


        

Answer 1

The concept of "most recent" is fairly vague. If you mean something like the 100 most recent rows then you can just add a TOP(100) to your SELECT clause.

If you mean the "most recent" based on a the most recent date then you can just do

SELECT timestamp,method,id,response 
FROM rpc_responses
HAVING max(timestamp) = timestamp