Thanks again Gunter. I'm sorry but all that has gone right over my head. Maybe I can try explaining it with pictures what I want to do ? Please see https://imgur.com/a/d3nORtD. The top pic is an example of my table1. The middle pic is table2 and an example of what I want to do. By entering ABC123 and FGH000 I want those 5 rows (3x ABC123 and 2x FGH000) to be hidden in table1 view. The schema for both is TEXT for hex and callsign, date for date. No PK set. I can add additional stuff to table2 layout/schema if needed, but not to table1. The 3rd pic is asking for what code I need in the box to make it happen. I hope that is clearer? Many thanks. Rob