for error checking, i'd put an "or die()" statement after the SQL included in devine's post (i know he just forgot it 😛), then if it DOES go wrong at any point, you can see exactly why.
As for the confirmation request, you just need something like
if (!$sql)
{
echo 'Sorry, there was a problem, please contact Iquil';
}
else
{
echo 'Update Successful, click here to return to the admin menu';
}