public function reset()
    {
        $this->table = '';
        $this->columns = [];
        $this->joins = [];
        $this->wheres = [];
        $this->whereIn = [];
        $this->groupBy = false;
        $this->orderBy = false;
        $this->offset = 0;
        $this->limit = 10;
        $this->fields = [];
        return $this;
    }