Here is a link to a sample spreadsheet:


What I want to do is count all unique values in column C (ID) and all values in column A (initial email) in the month of November.

This is the best I could come up with:

=COUNTUNIQUE(FILTER(Sample!C2:C,Sample!A2:A="Mon, Nov. 23, 2015 2PM"))

But it would only count one specific date in November so I would have to also count all the other dates and then total them. Is there a way for the formula to count all unique values in column C and count all values in Column A containing "Nov"? To add to that, I also need to count all values in Column F (Response category), containing unique ID for the month of November.

  • I can't see your spreadsheet because you didn't allow others to view it. Click "Share" in upper right.
    – user79865
    Dec 3, 2015 at 17:04
  • Also, the last sentence, with "containing unique ID for the month of November" is unclear. You may want to explain what exactly those values should contain.
    – user79865
    Dec 3, 2015 at 17:31
  • I just shared the link and I'm trying out the formula right now.
    – Vee
    Dec 4, 2015 at 3:37
  • No, I still can't see it. Try opening the link in a private browser window, to see how it appears to me.
    – user79865
    Dec 4, 2015 at 5:12
  • The link should finally be shared. I used the regexmatch but couldn't seem to get the right number. Please have a look at the 'statistics' tab.
    – Vee
    Dec 4, 2015 at 14:58

1 Answer 1


You can filted by regexmatch instead of equality.

=countunique(filter(Sample!C2:C, regexmatch(Sample!A2:A, "Nov")))

Matching the regular expression "Nov" simply means containing "Nov" somewhere in the string.

  • I tried the "regexmatch" formula (please see "Statistics" tab) but couldn't get the right number. It should have been 12 but the formula counted only 9.
    – Vee
    Dec 4, 2015 at 5:02
  • If I just do a pure 'countunique' on the Nov data, I get 9. It seems right to me. Example here - listing unique and counting for just Nov Dec 4, 2015 at 16:03
  • @Vee 9 is the correct number of unique values for all November dates. If you count unique values for each particular date separately, and then add, that's a different count. E.g., you can have 550 on Nov 3 and 550 on Nov 9. In a count for all of November, it's 1. Counting separately by dates and adding, it's 1+1 = 2.
    – user79865
    Dec 4, 2015 at 16:34
  • @NormalHuman That makes sense to me now. Thank you for the explanation.
    – Vee
    Dec 8, 2015 at 2:46
  • @TomWoodward Thanks for the response. You (and NormalHuman) both helped me.
    – Vee
    Dec 8, 2015 at 2:47

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