Kommentare zu: The crucial question: Which BI-Tool is able to aggregate this correctly? I say: “NONE!” http://dwhblog.org/blog/index.php/2006/11/25/the-crucial-question-which-bi-tool-is-able-to-aggregate-this-correctly-i-say-none/ A Real World Experience Fri, 30 Jul 2010 01:20:46 +0000 http://wordpress.org/?v=2.0.2 Von: Frank Backes http://dwhblog.org/blog/index.php/2006/11/25/the-crucial-question-which-bi-tool-is-able-to-aggregate-this-correctly-i-say-none/#comment-62452 Thu, 09 Apr 2009 08:49:39 +0000 http://dwhblog.org/blog/index.php/2006/11/25/the-crucial-question-which-bi-tool-is-able-to-aggregate-this-correctly-i-say-none/#comment-62452 After some time I'm not sure that MS Analysis Services would do it right. As far as I understand the "distinct sum"´function, it sums up the DISTINCT VALUES along the hierarchy and not the VALUES OF THE DISTINCT MEMBERS along the hierarchy. Consider those values please: * C1: 7.000 * C2: 7.000 * C3: 8.000 * C4: 4.000 Here are the expected results of the aggregation: * R1: 14.000 * R2: 19.000 * M1: 26.000 Can MS Analysis Services really calculate the right results? After some time I’m not sure that MS Analysis Services would do it right.

As far as I understand the “distinct sum”´function, it sums up the DISTINCT VALUES along the hierarchy and not the VALUES OF THE DISTINCT MEMBERS along the hierarchy.

Consider those values please:

* C1: 7.000
* C2: 7.000
* C3: 8.000
* C4: 4.000

Here are the expected results of the aggregation:

* R1: 14.000
* R2: 19.000
* M1: 26.000

Can MS Analysis Services really calculate the right results?

]]> Von: Cold Warehousing http://dwhblog.org/blog/index.php/2006/11/25/the-crucial-question-which-bi-tool-is-able-to-aggregate-this-correctly-i-say-none/#comment-6541 Fri, 24 Aug 2007 04:35:08 +0000 http://dwhblog.org/blog/index.php/2006/11/25/the-crucial-question-which-bi-tool-is-able-to-aggregate-this-correctly-i-say-none/#comment-6541 Microsoft Analysis Services 2005 seems to be the best way to go. Microsoft Analysis Services 2005 seems to be the best way to go.

]]> Von: Frank Backes http://dwhblog.org/blog/index.php/2006/11/25/the-crucial-question-which-bi-tool-is-able-to-aggregate-this-correctly-i-say-none/#comment-5 Thu, 30 Nov 2006 20:21:20 +0000 http://dwhblog.org/blog/index.php/2006/11/25/the-crucial-question-which-bi-tool-is-able-to-aggregate-this-correctly-i-say-none/#comment-5 @Andrew and Mosha: Many thanks for your valuable comments. I appreciate the advice from OLAP gurus like you. One more question: Can Analysis Services manage "distinct sum" with non-leaf members with data? In one hierarchy there can be non-leaf members, which must be aggregated in three different ways: 1) distinct sum over their descendants 2) distinct sum over their descendants and the member itself 3) no aggregation, given value for non-leaf member @Andrew and Mosha:

Many thanks for your valuable comments. I appreciate the advice from OLAP gurus like you.

One more question:

Can Analysis Services manage “distinct sum” with non-leaf members with data? In one hierarchy there can be non-leaf members, which must be aggregated in three different ways:

1) distinct sum over their descendants
2) distinct sum over their descendants and the member itself
3) no aggregation, given value for non-leaf member

]]> Von: Mosha Pasumansky http://dwhblog.org/blog/index.php/2006/11/25/the-crucial-question-which-bi-tool-is-able-to-aggregate-this-correctly-i-say-none/#comment-4 Thu, 30 Nov 2006 14:26:00 +0000 http://dwhblog.org/blog/index.php/2006/11/25/the-crucial-question-which-bi-tool-is-able-to-aggregate-this-correctly-i-say-none/#comment-4 Microsoft Analysis Services 2005 can do this kind of aggregation out of the box. It is called many-to-many dimensions. It allows you to compute distinct sum (similar to distinct count) - which is exactly what you need here. Microsoft Analysis Services 2005 can do this kind of aggregation out of the box. It is called many-to-many dimensions. It allows you to compute distinct sum (similar to distinct count) - which is exactly what you need here.

]]> Von: Andrew Wiles http://dwhblog.org/blog/index.php/2006/11/25/the-crucial-question-which-bi-tool-is-able-to-aggregate-this-correctly-i-say-none/#comment-3 Tue, 28 Nov 2006 18:55:12 +0000 http://dwhblog.org/blog/index.php/2006/11/25/the-crucial-question-which-bi-tool-is-able-to-aggregate-this-correctly-i-say-none/#comment-3 SAS Institutes CFO Vision was able to do this. I was the development manager for this product and we had to deliver exaclty this scenario for a large US customer. I am not sure if the current product SAS/FM has continued this functionality but I can give you a contact in the Eurpoean HQ if you would like to find out. It is not too difficult to implement this kind of logic in Analysis Services but it does require a bit of creative thinking. Regards SAS Institutes CFO Vision was able to do this. I was the development manager for this product and we had to deliver exaclty this scenario for a large US customer.

I am not sure if the current product SAS/FM has continued this functionality but I can give you a contact in the Eurpoean HQ if you would like to find out.

It is not too difficult to implement this kind of logic in Analysis Services but it does require a bit of creative thinking.

Regards

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