Question

I have a small chat app that I am working on, but got stuck with ordering and limiting the results that are displayed from the DB. I want to limit the results by 20 and display the latest results at the bottom of the HTML container DIV, I would need to get the highest ID of the chat table – 20 and then display those results. This is my current query

SELECT chat_box.*,

(SELECT MAX(chat_id) AS last FROM chat_box) AS last
FROM chat_box 
ORDER BY chat_id ASC
LIMIT last,20

Answer 1

You don’t need a MAX if you just want to display the last 20 entries of the table.

SELECT `you`, `should`, `use`, `a`, `column`, `list`
FROM chat_box
ORDER BY chat_id DESC
LIMIT 20

Update

SELECT `you`, `should`, `use`, `a`, `column`, `list`
FROM chat_box
WHERE chat_id > (SELECT MAX(chat_id) - 20 FROM chat_box)