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## Calculate active years from a customer

I am trying to calculate the amount of active years for customers.

We have different tables like "documents transaction date", "customer" and "sales values" .

The Tranaction date table is a calender, Customer is all customer information and both are linked to Sales values where are all transactions.

I can see the Active years in a matrix per year.

`Cumulative Distinct Count Until this YTD = TOTALYTD(DISTINCTCOUNT([Related Customer]),'SALES VALUES'[Related Date])`

But it is not giving me

Customer  years active.

A               2

B                1

c                 3

Etc.

1 ACCEPTED SOLUTION
Solution Sage

Hi @Sjon1791 ,

thank you for the interesting question.

You can solve this by adding a calculated column to your customer table.

The formula is the following:

```Years active =
VAR currentCustomer = CALCULATE(SELECTEDVALUE('CUSTOMERS'[Customer]))
VAR lastYearActive = CALCULATE(MAX('SALES VALUE'[Related Date]),'SALES VALUE'[Customer]=currentCustomer)
VAR firstYearActive = CALCULATE(MIN('SALES VALUE'[Related Date]),'SALES VALUE'[Customer]=currentCustomer)

RETURN YEAR(lastYearActive)- YEAR(firstYearActive)```

And here is what it looks like:

Finally, you can also find a Power BI file with an example here.

Let me know if this helps you!

Regards,

LC

Interested in Power BI templates? Check out my blog at www.finance-bi.com

Solution Sage

Hi @Sjon1791 ,

thank you for the interesting question.

You can solve this by adding a calculated column to your customer table.

The formula is the following:

```Years active =
VAR currentCustomer = CALCULATE(SELECTEDVALUE('CUSTOMERS'[Customer]))
VAR lastYearActive = CALCULATE(MAX('SALES VALUE'[Related Date]),'SALES VALUE'[Customer]=currentCustomer)
VAR firstYearActive = CALCULATE(MIN('SALES VALUE'[Related Date]),'SALES VALUE'[Customer]=currentCustomer)

RETURN YEAR(lastYearActive)- YEAR(firstYearActive)```

And here is what it looks like:

Finally, you can also find a Power BI file with an example here.

Let me know if this helps you!

Regards,

LC

Interested in Power BI templates? Check out my blog at www.finance-bi.com