joomla数据库操作示例代码，joomla示例代码

$row =& JTable::getInstance('comment', 'Table');
$row->load($id);
$row->bind(JRequest::get('post'))
$row->store()

$this->_db->setQuery($query);
$this->_db->loadObject();
$this->_getList($query, 0, 0); 

$db =& JFactory::getDBO();
$query = "SELECT count(*) FROM #__reviews";
$db->setQuery( $query );
$total = $db->loadResult();
$query = "SELECT * FROM #__reviews";
$db->setQuery( $query,$limitstart, $limit );
$rows = $db->loadObjectList();