Table with count distinct during last year for every date

[frsvch]

Hi all!

I have 2 columns (date,  customer_id) and i need calculation table with count of distinct customer_id during last 12 month for every date.

For example

Date	Number of customers
08.03.2017	3456
…
10.02.2018	6590

where 3456 -number of unique customer_id between 08.03.2017 and 08.03.2016

or 6590 - number of unique customer_id between 10.02.2018 and 10.02.2017.

I used solution like this, but it only works with the date that i set in the filter 

https://community.qlik.com/t5/Qlik-Sense-App-Development/How-to-count-values-between-two-dates-varia...

[Gysbert_Wassenaar]

Can you explain the date intervals? I don't know of any definition of 12 months that matches the interval between 08.06.2016 and 08.03.2017. Why isn't the interval 08.06.2016 to 08.06.2017?

[frsvch]

Sorry. This is mistake. Post updated