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客单价是指每位顾客平均购买商品金额。
公式为：sum(SaleAmount)/Count(CustomerID)。
在这种情况下，我们分析每个类别中的sum(SaleAmount)/Count(CustomerID)。
1. 添加图表，并绑定分类字段。
2. 在目标表上添加一个度量值。
3. 为度量值命名，并输入表达式内容。
sum('FactInternetSales'[SalesAmount])/count('FactInternetSales'[CustomerKey])
4. 将度量值绑定到数值中进行使用。
这里添加的是一个度量值，您可以直接使用该度量值，但不可以选择聚合方式和快速运算。
