Question

I have a table like this in an excel spreadshhet:

    Col1    |    Col2   |    Col3
 -----------+-----------+-----------
     A      |     X     |      1
     A      |     Y     |      2
     B      |     X     |      3
     B      |     Y     |      4
     B      |     Z     |      5

I want to use the aggregation feature of the pivot table.
Using the typical SUM of VALUES aggregation, provided by Excel, I get:

    Col1    |    Col3
 -----------+-----------
     A      |     3
     B      |     12

But I want to use a different aggregation function. I want to use something that does:

 Square root of ( Sum of (Square(x)))

So that in the end I get the table:

    Col1    |    Col3
 -----------+-----------
     A      |     SQRT(5)      <= Sqrt(1*1 + 2*2)
     B      |     SQRT(50)     <= Sqrt(3*3 + 4*4 + 5*5)

Is there ANY way (VBA, C++, assembly, whatever it takes) I can specify my own functions in the aggregation list?

NOTE: I KNOW HOW TO DO THIS IN A SHEET, DON’T BOTHER ANSWERING IF IT’S NOT ABOUT WRITING CUSTOM AGGREGATION FUNCTIONS FOR PIVOTTABLE

Answer 1

Its not possible to write a custom aggregation function for a standard pivot table. But you can probably do what you want using MDX… maybe an MDX expert would like to comment?