public function delete($t, $conditions = array()){
		if(is_array($t)){
			$conditions = $t;
		}elseif(is_string($t)){
			$this->table($t);
		}
		if(!empty($conditions)){
			$this->where($conditions);
		}
		$this->_sql = $this->getDeleteStatement();
		return $this;
	}