Inserting existingvalue-1 into db?

[Qben]

I'm trying to change the value in the database for stats_turns to its existing value-1 ..
This is the code, but nothing happens with it..

$stats_turns = $_SESSION['stats_turns'];
$dbturn = $stats_turns - 1;

if($villerda == $fields){
$sql = mysql_query("UPDATE users SET stats_turns='$dbturn' WHERE char_email='$email'") or die (mysql_error());
if(!$sql){
echo 'Error';
} else {
header("Location: place_2.php");
}

[matt_4013]

Why don't you just do this:

mysql_query("UPDATE users SET stats_turns=(stats_turns - 1) WHERE email='".$email."'");

[Qben]

Oo thanks