Concatenate every columns

[dgudkov]

Also, see this topic:

Aggregate for +500 columns

Hello, I hope you are all safe ! I have a question with the aggregate function. I have a large file (+500 columns) that I need to aggregate “by product” Exemple [1] and I need to have the Following output [2] How can I do this without having to tick all the columns one by one (as I did in my example) Thanks for your help Edward