joomla数据库操作示例代码

$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();