In the context of the NorthWind Customer Manager; when a Customer ID that does not exist in the system is used to load a Customer detail, then a Null instance should be returned.
在Northwind客户管理的上下文中，当使用系统中不存在的客户ID加载客户细节时，应该返回一个空实例。
This article USES the customer relational graph from the relational marketing study Angle to construct zhe KPI system of Key Account Manager.
文章从关系营销学的角度，通过采用客户关系图来构建大客户经理的关键绩效考核指标体系。
This test has analyzed how to evaluate the performance of key customer manager and how to construct the KPI system of key customer manager in KN coating company.
文章以KN涂料公司为例来分析大客户经理如何进行绩效考核及如何构建大客户经理的关键绩效指标考核体系。
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