Assign price/cost to the first occuring each month

[Mal1]

Hi,

I have a dataset of Date - Month - Product - Category where there are 3 categories and around 40 products.

I want to assign a cost only for the first occurence of each product in each month based on the category they belong to. Note that "Product" is not unique. Any advice for how to implement that?

Thanks for help!

[v-juanli-msft · Accepted solution]

Hi @Mal1

Although, i don't know how to assign a cost for the first occurence of product, i can figure out which ones are the first occurence of product.

Look at my test, 

First sort the table by "date" column (Modeling->Sort by column),

Second, in query editor,create an index column from 1, 

Third, create calculated columns below

minvalue = CALCULATE(MIN([Index]),ALLEXCEPT(Sheet1,Sheet1[Category],Sheet1[Month],Sheet1[Product]))

firstoccurence = IF([minvalue]=[Index],[Product])

Best Regards

Maggie