Запросы БД в двойке

public function getSumm($id){
$this->filterEqual('id', $id);
return $this->get('price');
}

    public function getSumm($id){
$this->selectOnly('SUM(cena)');
    $this->filterEqual('id', $id);
    return $this->get('price');
    }

$this->delete('table', $id);

$model = cmsCore::getModel('content');
$item = $model->getItem('photos', 'ORDER BY rating DESC LIMIT 1');