The Problem:
I have somewhere between 20 and 30 columns of varying lengths (dynamic and can change). I would love the ability to be able to stack them in Google Sheets.

I have found some solutions that work until you reach the textjoin() or concatenate() result limit of 50,000 or whatever it is. Those formulas are as follows:




Again, these both work but are limited and I expect results as long as 200,000 rows long.

A simplified example is:

It would be nice if it rendered only unique values and ignored blank cells. Does not need to be sorted.

BONUS: It would be also very cool if there was a version of this that would only produce cells that have 25 or fewer characters in them!

  • Only include microsoft-excel on questions about google-sheets when the question is about something that involve both apps like converting a file from one format to the other.
    – Rubén
    Aug 27, 2021 at 16:45
  • Okay! I am slowly learning. Thank you, Ruben! Aug 27, 2021 at 17:07
  • Possible duplicate: webapps.stackexchange.com/q/72835/88163 (try using FLATTEN and QUERY)
    – Rubén
    Aug 27, 2021 at 17:24
  • That does solve the beef of my situation! Now I just need to figure out how to use a formula to filter out the results that are over 25 characters! Aug 27, 2021 at 17:57

1 Answer 1


So I believe I figured it out after parsing together some of the answers that I received for this one (thanks everyone):

=arrayformula(FILTER((unique(filter(FLATTEN(G2:AB),len(FLATTEN(G2:AB))))),len((unique(filter(FLATTEN(G2:AB),len(FLATTEN(G2:AB)))))) <= 25))

This does all of what I was hoping for:

  • It takes all data within the range and stacks it.
  • It also gets rid of any blank columns
  • Finally, it gets rid of any phrases over 25 characters long

I hope this helps others in need of an oddly specific solution!

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