Помогите с простым запросом к базе - Joomla 1.5: Общие вопросы

$db1 =& JFactory::getDBO(); 
$query = "SELECT product_weight FROM jos_vm_product WHERE product_id='$product_id'"; 
$db1->setQuery( $query ); 
$greeting = $db1->loadResult(); 
$greeting = (int)($greeting);
echo $greeting;

$db1 =& JFactory::getDBO(); 
$query = "SELECT product_weight, product_full_image FROM jos_vm_product WHERE product_id='$product_id'"; 
$db1->setQuery( $query ); 
$greeting = $db1->loadResult(); 
$greeting = (int)($greeting);
echo $greeting;

$db1 =& JFactory::getDBO(); 
$query = "SELECT product_weight, product_full_image FROM jos_vm_product WHERE product_id='$product_id'"; 
$db1->setQuery( $query ); 
$greetings = $db1->loadObjectList(); 
//а дальше так например
foreach($greetings as $greeting)
{
echo $greeting->product_weight;
echo $greeting->product_full_image;
}

$db1->loadObject($greetings); 

$baza =& JFactory::getDBO(); 
$query_baza = "SELECT * FROM #__vm_product where product_id='$product_id'"; 
$baza->setQuery( $query_baza ); 
$greetings = $baza->loadObjectList(); 
foreach($greetings as $greeting)
$rewq = $greeting->product_full_image; 
echo $greeting->product_weight."<br />";
echo $greeting->product_available_date."<br />";
echo $greeting->product_name."<br />";
echo $greeting->child_options."<br />";
echo $greeting->product_full_image."<br />";

$baza =& JFactory::getDBO(); 
$query_baza = "SELECT * FROM #__vm_product where product_id='$product_id'"; 
$baza->setQuery( $query_baza ); 
$greeting = $baza->loadObject(); 
$rewq = $greeting->product_full_image; 
echo $greeting->product_weight."<br />";
echo $greeting->product_available_date."<br />";
echo $greeting->product_name."<br />";
echo $greeting->child_options."<br />";
echo $greeting->product_full_image."<br />";