尝试计算 MDX 中的四分位数

Question

我的数据是这样的：

ID                                   |PersonID  |CompanyID  |DateID  |Throughput |AmountType
33F467AC-F35B-4F24-A05B-FC35CF005981 |7         |53         |200802  |3          |0
04EE0FF0-511D-48F5-AA58-7600B3A69695 |18        |4          |201309  |5          |0
AB058AA5-6228-4E7C-9469-55827A5A34C3 |25        |69         |201108  |266        |0

大约有一百万行。列名 *ID 引用其他表，因此它们可以用作维度。

我有一个 OLAP 多维数据集，其中吞吐量列作为度量，其余列作为维度。

我想计算吞吐量度量的四分位 1 和 3。

我遵循了这个指南：https://electrovoid.wordpress.com/2011/06/24/ssas-quartile/ 连同这个 post：Calculating Quartiles in Analysis Services

来自那些我尝试使用此 MDX 查询的人：

WITH
SET selection as ([Dates].[Year].&[2014],[Dates].[Month].&[1])  

SET [NonEmptyIds] AS
 NonEmpty(
      [ThroughputID].[ID].[id]
   *[ThroughputID].[ID].[Id].ALLMEMBERS
  ,
  {[Measures].[Throughput]} * [selection]
 )
 SET [ThroughputData] AS 
ORDER
    (    
        [NonEmptyIds],  
        [Measures].[Throughput], 
        BASC
     )
MEMBER [Measures].[RowCount] AS COUNT (ThroughputData)
MEMBER [Measures].[i25] AS ( .25 *  ( [RowCount] - 1 ) ) + 1
MEMBER [Measures].[i25Lo] AS FIX([i25])   - 1
MEMBER [Measures].[i25Rem] AS ([i25] - FIX([i25]))
MEMBER [Measures].[n25Lo] AS (ThroughputData.Item([i25Lo]), [Throughput])
MEMBER [Measures].[n25Hi] AS (ThroughputData.Item([i25Lo] + 1), [Throughput])
MEMBER [Measures].[Quartile1] AS [n25Lo] + ( [i25Rem] * ( [n25Hi] - [Throughput] ))

SELECT
selection ON 0,
[Measures].[Quartile1]
ON 1
FROM (SELECT [Dates].[Y-H-Q-M].MEMBERS ON 0 FROM [Throughput])

但我得到：'Query (6, 7) The ID hierarchy is used more than once in the Crossjoin function.'

我对 OLAP 和 MDX 很陌生。有什么问题吗？我应该如何计算正确的四分位数？

我在某处读到我需要 ID 维度才能在计算四分位数时获得包含所有值而不是聚合值的集合...

Answer 1

罪魁祸首是以下代码：

SET [NonEmptyIds] AS
 NonEmpty(
      [ThroughputID].[ID].[id]
   *[ThroughputID].[ID].[Id].ALLMEMBERS
  ,
  {[Measures].[Throughput]} * [selection]
 )

您不能在交叉联接中多次使用同一层次结构。在这里您使用了 [ThroughputID].[ID] 两次。请尝试以下操作：

SET [NonEmptyIds] AS
 NonEmpty(
      [ThroughputID].[ID].[Id].ALLMEMBERS
  ,
  {[Measures].[Throughput]} * [selection]
 )

尝试计算 MDX 中的四分位数

Trying to calculate quartiles in MDX

mdx

cross-join

quartile