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Average only for NonEmpty - SSAS MDX

 3 years ago
source link: https://www.codesd.com/item/average-only-for-nonempty-ssas-mdx.html
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Average only for NonEmpty - SSAS MDX

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For one day (several datetime records possible) I want to create a 2nd measure computing an AVG only for nonempty values based on my 1st measure. I've tried the following :

"CREATE MEMBER CURRENTCUBE.[Measures].[M2]
AS AVG([Measures].[M1]),
VISIBLE = 1 ,  ASSOCIATED_MEASURE_GROUP = 'DATA' ;"

But the SSAS AVG function seems to return me a Sum:

DateTime "M1"
1/1/16 12:10 "10"
1/1/16 13:10 "12"
1/1/16 14:10
1/1/16 15:10 "9"
1/1/16 16:10
1/1/16 17:10 "21"
1/1/16 18:10
1/1/16 19:10 "2"

Average for nonempty Measure values (10+12+9+21+2)/5 nonempty Values = 10,8

If you want an average daily value then @whytheq showed a way to do it in MDX. But I believe you want a simple average. The proper way to do that in SSAS is to create a measure M1 tied to SQL column M1 with AggregateFunction=Sum (which you already have) and a second measure M1_Count on SQL column M1 in that measure group with an AggregateFunction=Count.

Then create a calculated measure:

CREATE MEMBER CURRENTCUBE.[Measures].[M1 Avg] as
IIF([Measures].[M1_Count]=0,null,[Measures].[M1]/[Measures].[M1_Count]);

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