$data=Db::name('OrderDetail')->where($where)->field('title AS name,sum(buy_number) AS value')->order('value desc')->limit(10)->group('goods_id')->select();
$data=Db::name('Order')->alias('o')->join(['__ORDER_DETAIL__'=>'od'],'o.id=od.order_id')->where($where)->field('od.title AS name,sum(od.buy_number) AS value')->order('value desc')->limit(10)->group('od.goods_id')->select();