I would use fetch_array in case you to later have multiple rows and you should specify the field you want. Assuming you want history.field, then:
PHP Code:
$result = $db->query_read("SELECT * FROM " . TABLE_PREFIX . "history");
$l_history['field'] = '';
while ($l_history = $db->fetch_array($result)){
$history['field'] .= $l_history['field'];
}
and then in the template:
HTML Code:
{vb:raw history.field}