Conditional MDX Query to calculate sum and average

问题

I have a sales(SalesID, GoodsType, GrossSale, AverageSale). I was to write two MDX expression in MS Visual Studio SSAS cube's Calculation tab to calculate Sum of GrossSale and Average of GrossSale where GoodsType is "Food". If someone please write the MDX expression for me?

回答1:

In many cases, you rely on the Analysis Services engine to do the summing for you. To get the sum for the measure [GrossSales] for a single attribute member 2 for attribute DataType of dimension Dim, assuming the measure is configured to use sum as its aggregation value, you can just reference it in a tuple like

([Dim].[DataType].[2], [Measures].[GrossSales])

and are done. To get the sum for three different values, you can either sum the tuples, i. e.

([Dim].[DataType].[1], [Measures].[GrossSales]) +
([Dim].[DataType].[2], [Measures].[GrossSales]) +
([Dim].[DataType].[3], [Measures].[GrossSales])

or use the sum function as follows:

Sum( { [Dim].[DataType].[1], [Dim].[DataType].[2], [Dim].[DataType].[3] },
    [Measures].[GrossSales])

The first argument for Sum is a set, the second a numeric expression.

来源：https://stackoverflow.com/questions/19398353/conditional-mdx-query-to-calculate-sum-and-average