need help in order by clause

i want to select data from db order by date column and display the latest post first
$query = "SELECT * FROM jobs_uni limit $start, $per_page";
//echo $query;
$result = mysql_query($query);

how to do this?

i already use this way
$query = "SELECT * FROM jobs_uni limit $start, $per_page ORDER BY date DESC";

and
$query = "SELECT * FROM jobs_uni ORDER BY date DESC limit $start, $per_page";

both are not working

Add proper errors checks on your query to reveal the etrors in it, like
$result=mysql_query($query) or die(mysql_error(). '<br><br>query : '.$query );