Problem with aggr function

[#1]

Hi all,

I ask someone for help

My problem is this:

In a data structure similar to that present in the attached file, I would like to create a table (see Table 2-B)

when I extract only the rows of people in a given month did not have sales and at the same time

compared with sold in the previous month.

I used the aggr with Set Analysis table see Table 2 and Table 2-B.

1-Why the table Table 2 does not work?

If I do not apply any selection on the month it seems to work well (see Table2-B).

For example Amanda has not had sales last month, but he's had in the previous month.

2-If I select a month, for example, three months, I think you should not change anything, it does not work..

Conversely, if I select for example the second month (months number 2),

I would expect to see in the table Table2-B only Frank for the month 2 had no sales while he's had in month 1.

Can someone give me a tip?

    Hello and Thank you

[#2]

I solved this problem with this logic.

I created two variables, one to store the last date and the second variable to store the last date -1.

Vmax: = MAX (Month)

vMaxMin1: = MAX ({$} <Month-={"$(vMax)"}> Month)

In the chart I created two expressions: LAST and LAST -1

LAST: Sum ({} <Month={"$(=max(Month))"}> Sales)

LAST -1: Sum ({} <Month={"$(vMaxMin1)"}> Sales)

I hope helped you