I like to add an additional column in filter formula. This one is working, but not exactly what i need:
=FILTER({detroit!A2:N,"detroit"&row(detroit!A2:A)},detroit!A2:A<>"")
I need only the text "detroit" without the row number, something like this:
=FILTER({detroit!A2:N,"detroit"},detroit!A2:A<>"")
I think i need to use a function for every cell, like row, what gives back nothing?
It also have to be fast to calculate, because of the size of the data.
Any ideas to solve this?