Last month date of previous month

Case 1

 If  you have any date and you want to calculate last month date of previous month in data dataiku function then use "inc" and "datePart" function.

inc(dt,toNumber(concat('-',datePart(dt,'Day'))),'day') 

Example : Parameter date - 2023-06-26

Result :- 2023-05-31

Case 2

If you have specific date and you want to get  last month date of  previous months or 2 previous month data then use below code

inc(inc(asDate("2023-06-26","yyyy-MM-dd"),toNumber(concat('-',datePart(asDate("2023-06-26","yyyy-MM-dd"),'Day'))),'day'),-1,'months')

Example : Parameter date - 2023-06-26

Result :- 2023-04-30