thinkPHP访问不同表前缀

        $Model=new Model();
        $goods=$Model->Table('sdb_goods');

        $param['brief']=array('like','%'.$p_title.'%');
        $param['name']=array('like','%'.$p_title.'%');
        $param['_logic']='or';
        $goods_list=$goods->field('name,price,goods_id,mktprice,small_pic')->where($param)->select();

        $this->assign('seek_drug',$goods_list);