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## Calculation of measure/column- based on next date in a partition by case with multiple rows per date

I have a table with customer id and order date (and various other fields).

Each order date and customer has multiple rows (see example).

In addition, I have in another column the date we stopped working with the customer.

I would like to calculate the # of customers who had their next order in under 6 months, and the number of customers who we stopped working with (left) 6 months or less after their order date.

See this table to better understand what should be counted

Appreciate the help!

Super User

Hi,

The next time you hare some data, share it in a format that can be pasted in an MS Excel file.  Sharing an image is useless.  These calculated column formulas work

``Next order within 6 months? = if(ISBLANK(CALCULATE(MIN(Data[order date]),FILTER(Data,Data[Customer id]=EARLIER(Data[Customer id])&&Data[order date]>EARLIER(Data[order date])))),BLANK(),if(DATEDIFF(Data[order date],CALCULATE(MIN(Data[order date]),FILTER(Data,Data[Customer id]=EARLIER(Data[Customer id])&&Data[order date]>EARLIER(Data[order date]))),MONTH)<=6,1,BLANK()))``
``Column = if(ISBLANK(Data[Next order within 6 months?]),if(DATEDIFF(Data[order date],Data[date stopped working],MONTH)<=6&&DATEDIFF(Data[order date],Data[date stopped working],MONTH)>0,1,BLANK()),BLANK())``

Hope this helps.

Regards,
Ashish Mathur
http://www.ashishmathur.com

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