power bi: different calculations for several rows - powerbi

Question

Would you, please, help me to apply different calculations for 2 rows in power BI:
that is, to transform this table:
client_ids products purchased month
1 0 0 jan
2 1A 1 jan
2 1B 1 jan
3 0 0 jan
4 0 0 jan
5 0 0 feb
into this:
purchased jan feb
1 1
0 3 1
That is, to perform calculations:
-on purchased = 0 - count over month, client
-on purchased = 1 - count distinct over month, client
Thank you.
I used the method:
-create the reference to the main query in the query editor
-drop the column with products
-drop duplicates
But this makes downloading the report slower.

Answer 1

To return the expected output, you can use two steps to obtain the result from the data:
Assuming this is your table with date:
First, calculate the month different compared with today to find recently month (you can try other method depend on your data nature):
Mon Diff = (YEAR(NOW()) - YEAR(Sheet1[date])) + (MONTH(NOW()) - MONTH(Sheet1[date]))
Second, rank the recent month as current:
rank =
var ranking = RANKX(Sheet1,Sheet1[Mon Diff],,,Dense)
return
SWITCH(ranking,1,"prior",2,"current")
Third, generate distinct values from purchase column
Table = DISTINCT(Sheet1[purchased])
Fourth, calculate the frequencies of 0 & 1 in Prior Month, the same for Feb
Jan = CALCULATE(COUNT(Sheet1[rank]),Sheet1[rank]="prior",
Sheet1[purchased]=EARLIER('Table'[purchased]))
Feb = CALCULATE(COUNT(Sheet1[rank]),Sheet1[rank]="current",
Sheet1[purchased]=EARLIER('Table'[purchased]))
The New table for the infor (In Jan, purchase 2 has 2 occurrence instead of 1):