Arithmetic operations for date column


I have a monthly time series for price data in long format, that is one price per key per month in each row. Now I need to calculate the previous month column (current month -1). But I am not sure how to do it. Any help is appreciated. Thanks.

Best regards,


Maybe this thread The Best Way for the end of month - #2 by mlauber71 could help you to find a solution.


What is the data type of the current month column? Can you upload a data sample?
If the current month is integer you can use “Math formula” node and do a subtraction.

Have you tried the Lag Column node (allows to shift one or more rows)

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