Federico Venturin and Gianni Ceresa - Thank you :) I've tried this and it's working! Unsure why I felt the need to create a second Dataflow to begin with, but your suggestion is much easier and efficient

Hi all, Many thanks for your replies :) Federico Venturin - I tried your suggestion, but all rows are returning 'N', which as Gianni Ceresa mentioned is due to the formula working at a row level instead of column. Mostafa Morsy-Oracle - The dataset in question is an Excel spreadsheet exported from another system and…