id=_connection.QueryFirstOrDefault<int?>(" select id from dc_base_transfer_freight_new where bailun_sku=@bailun_sku and warehouse_code=@warehouse_code ",new{bailun_sku=bailun_sku,warehouse_code=warehouse_code})??0
id=_connection.QueryFirstOrDefault<int?>(" select id from dc_base_transfer_freight_new where bailun_sku=@bailun_sku and warehouse_code=@warehouse_code ",new{bailun_sku=bailun_sku,warehouse_code=warehouse_code})??0