Calculate days between order date of order n and order n+1 of each customers in Power BI

[KiKa]

How can I calculate the number of days between order n and order n+1 for each customer in Power BI?

I want to show and analyze the timespan*(in the day)* between first and second, second and third, etc orders.

[v-yiruan-msft · Accepted solution]

Hi @KiKa ,

You can create a calculated column as below to get it:

Number of days = 
VAR _nextodate =
    CALCULATE (
        MIN ( 'Table'[order date] ),
        FILTER (
            ALL ( 'Table' ),
            'Table'[user id] = EARLIER ( 'Table'[user id] )
                && 'Table'[order id] > EARLIER ( 'Table'[order id] )
        )
    )
RETURN  
    DATEDIFF ( 'Table'[order date], _nextodate, DAY )

Best Regards

[amitchandak]

@KiKa , Try a new column like

New column =
var _max = maxx(filter(Table, [User Id] =earlier([User Id]) && [Order Id] < earlier([Order Id]) ),[Order ID])
return
datediff([order Date] , maxx(filter(Table, [User Id] =earlier([User Id]) && [Order Id]= _max ),[Order Date]) , Day)+1

[ErikOmni]

@amitchandak 

Hey! I used your proposed solution above to solve a similar problem. However, the formula seems to struggle whenever the second order is in a new year or whenever a customer has placed two orders at the same day (see below example). In those cases it turns out negative.

this is how the formula looks like with my data

Days between orders =

var _max = maxx(filter(OrderData, [CustomerID] =earlier([CustomerID]) && [OrderID] < earlier([OrderID]) ),[OrderID])

return

datediff([OrderDate] , maxx(filter(OrderData, [CustomerID] =earlier([CustomerID]) && [OrderID]= _max ),[OrderDate]) , Day)+1

Any ideas? Thanks!