如何遍历表格从最后一行到第一行？

Question

My table:

-----------------------
| id:      | data:    |
|---------------------|
| 1        | a        |
| 20       | b        |
| 546      | c        |
-----------------------

I want to store the data in an array from last inserted row (id is auto incremented) to first.

$sth = $dbh->query('SELECT * FROM mytable');
$data = array();
while ($row = $sth->fetch(PDO::FETCH_ASSOC))
    {
        array_push($data, $row);
    }
return $data;

What can I add to the query in order to loop through the table from bottom to top?
I tried variations of ORDER BY but they didn't work, I'm missing something.

Answer 1

Get records by descending order

use following query

SELECT * FROM mytable order by id desc

where id is the auto increment id of your table

Answer 2

Change MySQL statement to be

SELECT * FROM 'mytable' ORDER BY 'id' DESC

or reverse the array using PHPs reverse array function

return array_reverse($data);