Calculated column which counts how many times the value appears in the table for the last 30 days

[Anonymous]

Hello,

I have an inventory table with 2 columns, product_id and date.

Each product_id only has a date for the days we had it in stock.

Im trying to to count how many days we had the product in stock for the last 30 days before the date in the column, and i want this for all the past dates, ie check fro mthat date 30 days back how many entries it has.

[SpartaBI · Accepted solution]

@Anonymous 

Column = 
VAR _current_product = 'Table'[product_id]
VAR _current_date = 'Table'[date]
VAR _result =
    COUNTROWS(
        FILTER(
            'Table'
            ,'Table'[product_id] = _current_product
                && 'Table'[date] >= _current_date - 29
                    && 'Table'[date] <= _current_date
        )
    )
RETURN
    _result

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[Anonymous]

Flawless solution, thank you so much!

[SpartaBI]

@Anonymous my pleasure 🙂