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troubleshooting Question

calculating a weighted average in SQL, SSRS

Avatar of erp1022
erp1022Flag for United States of America asked on
Microsoft SQL ServerMicrosoft SQL Server 2008SSRS
7 Comments1 Solution8331 ViewsLast Modified:
Hello Experts,

Does anyone know how to calculate a weighted average in SQL?

First I get the average of something: COUNT(transactions)/Fee = Average
Then to get the weighted average I would have to total the above values of 'Average' for the three different transactions types we use, and then divide that by the total count.

I cannot create a calculated field because in SSRS you can't use aggregate functions in a calc field. Also, in SSRS, I have tried creating an expression:

=(SUM((Fields!CRDTAMNT.Value/COUNT(Fields!Trans.Value))* COUNT(Fields!Trans.Value)))/COUNT(Fields!Trans.Value)

and I keep getting errors about nested aggregate functions.

So first of all, should I do this in my query or somewhere in SSRS?
Second of all, what is the code/syntax to achieve this?

Thanks.

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