How to create a filter with count

[clo_64]

I would like to create a short table showing how much customers have bought how much product,s and I'm struggling getting the COUNT or COUNTROWS working as an expression within CALCULATE/CALCULATETABLE.

Here my table :

And would like to get:
Nbr of Products     Nbr of Customers
1                             3
2                             2

How do I do that with DAX?
Thanks

[tackytechtom · Accepted solution]

Hi @clo_64,

I think I got to a solution:

Here the DAX:

New Table = 
VAR _helpTable =
SUMMARIZE (
    TableCustomerProduct,
    TableCustomerProduct[Customer],
    "Nbr of Products", DISTINCTCOUNT ( TableCustomerProduct[Product] )
)
RETURN
SUMMARIZE (
    _helpTable,
    [Nbr of Products],
    "Nbr of Customers",
    CALCULATE (
        DISTINCTCOUNT ( 'TableCustomerProduct'[Customer] ),
        FILTER (
            VALUES ( 'TableCustomerProduct'[Customer] ),
            CALCULATE ( DISTINCTCOUNT ( TableCustomerProduct[Product] ) ) = [Nbr of Products]
        )
    )
)

The _helpTable does a grouping on customer with a distinct count on product. The return statement uses the Number of Products from the _helptable combined  with a "having clause" in order to retrieve the number of customers per number of products

Let me know if this helps 🙂

/Tom
https://www.tackytech.blog/
https://www.instagram.com/tackytechtom/

[clo_64]

Excellent! Very smart this double SUMMARIZE!
Thanks Tom

[ManguilibeKAO]

Hi,

Coulld you explain why you have 2 2 on the second line of your output?  Shouldn't it be 2 1, as only the customer Gamma has bought 2 products?

Best regards.

[clo_64]

Because Ypsilon has also bought 2 distint products.