SAS OLAP Cubes: Percent of Total MDX Calculation
MDX is a powerful tool for building custom calculations in SAS OLAP cubes. Here is a good example of computing the percent of total for a given measure and given hierarchy in a dimension. This code is written as part of the PROC OLAP procedure.
DEFINE Member “[SGF].[Measures].[Percent of Total Sales]” AS
, [Measures].[SalesSum]) = 0
, [Measures].[SalesSum]) = NULL
), FORMAT_STRING=”PERCENT10.2″ ‘ ;
The important thing to realize here is that this MDX code is specific to a hierarchy. I have made the hierarchy references bold in the example above to show this. I will go into how to make this part of the code dynamic in a future post. This MDX calculation does basic division to compute a percentage by using the “CurrentMember” and “Parent” MDX functions to dynamically reference aggregations at the parent or “total” level for a given measure.
Here is the example output:
Example code and data can be found here: http://stephenoverton.net/SASCode/SGF2011/.
Bryan Stines and I wrote a paper for SAS Global Forum 2011 called Measures, Members, and Sets, Oh My! Advanced OLAP Techniques, which also describes this technique.
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