$query = "
select USER_ID as uid
from {$config['TABLE_PREFIX']}USER_GROUPS
where GROUP_ID = ?
and USER_ID =
(select distinct USER_ID
from {$config['TABLE_PREFIX']}USER_GROUPS
where GROUP_ID <> ?
and USER_ID = uid)
";
$sth = $dbh->do_placeholder_query($query,array($k,$k),__LINE__,__FILE__);
$in_other = $dbh->total_rows($sth);