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Frequent Visitor
Posts: 3
Registered: ‎06-07-2018
Accepted Solution

Maximum date difference between consecutive purchases for a customer

Hi!

 

I am having troubles with calculating the maximum difference between two consecutive purchases for each customer. Note that this is not the same as date difference between first and last purchase.

 

I have two tables (Purchase_table and Customer_table) which are related via CustomerID. In the Purchase_table the same CustomerID's are existing multiple times. As shown in the example pictures, I would like to calculate values for the column Max_diff_betw_purch. In the example I manually inputted value "8" for customer "1001", since it is the date difference between his second and third purchase, which is bigger than the difference between his first and second purchase.

 

Purchase_table.png

Customer_Table.png

Any help with this? I would prefer to do this with Power BI Desktop in data mode by adding a new column (Max_diff_betw_purch).

 

 

Sincerely,

L


Accepted Solutions
Super User
Posts: 2,850
Registered: ‎09-27-2017

Re: Maximum date difference between consecutive purchases for a customer

@Regulate

 

You can use this column in the Customers Table

 

Max_diff_between_Purchase =
VAR temp =
    CALCULATETABLE ( VALUES ( Purchase_table[PurchaseDate] ) )
VAR temp1 =
    ADDCOLUMNS (
        temp,
        "Days", DATEDIFF (
            [PurchaseDate],
            MINX (
                FILTER ( temp, [PurchaseDate] > EARLIER ( [PurchaseDate] ) ),
                [PurchaseDate]
            ),
            DAY
        )
    )
RETURN
    MAXX ( temp1, [Days] )

View solution in original post

Super User
Posts: 2,850
Registered: ‎09-27-2017

Re: Maximum date difference between consecutive purchases for a customer

@Regulate

 

Please see attached file with your sample data

 

maxdays.png

View solution in original post

Attachment

All Replies
Super User
Posts: 2,850
Registered: ‎09-27-2017

Re: Maximum date difference between consecutive purchases for a customer

@Regulate

 

You can use this column in the Customers Table

 

Max_diff_between_Purchase =
VAR temp =
    CALCULATETABLE ( VALUES ( Purchase_table[PurchaseDate] ) )
VAR temp1 =
    ADDCOLUMNS (
        temp,
        "Days", DATEDIFF (
            [PurchaseDate],
            MINX (
                FILTER ( temp, [PurchaseDate] > EARLIER ( [PurchaseDate] ) ),
                [PurchaseDate]
            ),
            DAY
        )
    )
RETURN
    MAXX ( temp1, [Days] )
Super User
Posts: 2,850
Registered: ‎09-27-2017

Re: Maximum date difference between consecutive purchases for a customer

@Regulate

 

Please see attached file with your sample data

 

maxdays.png

Attachment
Highlighted
Frequent Visitor
Posts: 3
Registered: ‎06-07-2018

Re: Maximum date difference between consecutive purchases for a customer

Perfect, thank you Zubair! Your column worked like a charm.

 

I really appreciate the help!

 

-L