表达式使得你可以为每个订单增加相应的客户姓名。
The expression would allow you to also add in the customer name for each order.
顾客拥有以前订单的集合，每个订单包含几个商品。
The customer has a collection of previous orders, and each order consists of several items.
例如，可能会为每个订单分配一个唯一的订单号。
For example, you might assign each order a unique order number.
您也可以查看结算记录每个销售订单。
您不希望一个一个地提交对每个客户的订单的查询。
You would not want to submit individual queries for orders for every customer.
您不希望一个一个地提交对每个客户的订单的查询。
You would not want to submit individual queries for orders for every customer.
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