Using an Advanced Function based on existing column advanced function
We have a report where we're getting the count distinct plus the weighted average values. We want to get the Delta value between the 3 month period (example on column F).
Because the column is already using an advanced function we can't use the results to calculate using another advanced function or, use two advanced functions in the same column.
In the example below, we have columns A, B & C as output from the database.Column D is the count distinct plus weighted average of column C.
How do we get to column F using the advanced function "Delta From Last N" please.