prefromsql+=" and bailun_sku_quantity_shipped<=0";
prefromsql+=" and seller_account in ('"+string.Join("','",list.Select(a=>a.seller_account))+"') and website in ('"+string.Join("','",list.Select(a=>a.website))+"') and order_currency in ('"+string.Join("','",list.Select(a=>a.order_currency))+"')";
prefromsql+=" group by seller_account,website,order_currency,platform_type";