Question

I have a table called Live, and in the table I have public_id. In public_id are numbers (e.g. 1,2,3,4,5). How can I get the highest number or the last entry’s number?

Answer 1

I’d choose

SELECT public_id FROM Live ORDER BY public_id DESC LIMIT 1;

It has already been posted, but i’ll add something more:

If you perform this query usually you can create an index with inverted ordering.

Something like:

CREATE INDEX ON Live (public_id DESC) 

Please Note

DESC

PHP + MySQL code:

<?php
$result = mysql_query('SELECT public_id FROM Live ORDER BY public_id DESC LIMIT 1;');
if (mysql_num_rows($result) > 0) {
   $max_public_id = mysql_fetch_row($result);
   echo $max_public_id[0]; //Here it is
}
?>