public function one($param = true){
        $this->isAr = true;
        if($this->isPretreatment){
            self::$Pre = $this->bindSql();
            if(!$param) return self::$Pre->queryString;
            return $this->dbh->pone($this->bindSql());
        }
        $bind = $this->bindSql();
        if(!$param) return $this->PrintSQL();
        $this->initialize();
        return $bind->one();
    }