$user_model = ActiveRecord::model('User')->findByAttributes(array('LOGIN'=>$this->LOGIN, 'EMAIL'=>$this->EMAIL));
User::model()->findAll('login=:login or email=:email', array('login' => $this->login, 'email' => $this->email))
ActiveRecord::model('User')->findAll("'LOGIN'='".$this->LOGIN."' or 'EMAIL'='".$this->EMAIL."'");
$criteria = new CDbCriteria();
$criteria->addCondition("'LOGIN'=".$this->LOGIN, "OR");
$criteria->addCondition("'EMAIL'=".$this->EMAIL);
$users = User::model()->findAll($criteria);