The third example shows how to find a customer name and how to delete it.
第三个例子展示了如何查找某一客户名和如何删除它。
In this case, for example, you might want to delete a customer but keep the customer's orders around for data-gathering purposes.
例如，在本例中，您可能需要删除一个客户，但出于数据收集目的，需要保留客户的订单。
In this example business case, it is not allowed to delete a customer as long as associated orders exist.
在这个业务示例中，只要存在相关的订单，就不允许删除客户。
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