You can for example use a Prepare recipe to compute the time difference between two columns (these dates have to be parsed). For this, you can use the processor "Compute difference between two dates" in the Prepare recipe and select the two columns.
You can define the granularity of the output right in the new step (from years to seconds).
Indeed! Thanks for replying. I tried this on my side and it seems to be working stillusing the formula in a Prepare recipe. The idea is to rebuild the date with hours:minutes:secondes, from the time difference in seconds.