php code question

I'm learning how php and mysql interact.  I run phpbb and decided to start learning by making a page that restores the admin status on a particular user in case it ever got changed.  I know there are other easy ways, but I'm trying to learn why mine doesn't work.

In the following, in the table named phpbb_users, I want to make user_id 2's user_level equal 1 via the php script.

The following connects to the database and does the echo at the end, but doesn't actually update the database.  What am I doing wrong?

<?php
$host = "localhost";
$db = "dbnamehere";
$user = "myusername";
$pw = "mypassword";
mysql_connect($host, $user, $pw) or die(mysql_error());
mysql_select_db($db);
$sql = "UPDATE " . phpbb_users . "
SET user_level = 1
WHERE user_id = 2";

echo "admin restored";
?>

What am I doing wrong?

LVL 1
source2k3Asked:
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mattjp88Commented:
you need $result=mysql_query($sql); before the echo.  Here is a great tutorial about php and mysql, everything you need.  http://www.freewebmasterhelp.com/tutorials/phpmysql/1

-Matt
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source2k3Author Commented:
You're the man.
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