query code standards

[Antivirus]

I'm aware that both give me the same result, however with regards to an interger in a WHERE clause, which method is better? Enclosing the int within '2' or without. Is either method faster, or less likely to create problems elsewhere?

PHP Code:

$check = $db->query_first("
    SELECT eventid FROM " . TABLE_PREFIX . "scst_event 
    WHERE eventid = '" . $vbulletin->GPC['eventid'] . "' 
    AND userid = '" . $vbulletin->userinfo['userid'] . "' LIMIT 0, 1
"); 


or like this:

PHP Code:

$check = $db->query_first("
    SELECT eventid FROM " . TABLE_PREFIX . "scst_event 
    WHERE eventid = " . $vbulletin->GPC['eventid'] . " 
    AND userid = " . $vbulletin->userinfo['userid'] . " LIMIT 0, 1
"); 


thanks