Counting the number of unique contacts in multi-select contact column for a specific date

I'm looking for a formula that would be able to count the number of unique contacts that are in a contact column that match a specific date. I have a multi-select contact column that has the names of people that are attending meetings throughout the week, and I want to be able to see how many unique attendees will be attending meetings on any given day (some of the meetings have the same people attending them, so I can't use a straight count of the names within the multi-select contact column as their names will show up multiple times).

I know this isn't the formula, but looking for what the right formula would be:

=COUNTM(DISTINCT([Meeting Attendees]:[Meeting Attendees], [Meeting Date]:[Meeting Date], =DATE(2023, 11, 2)

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Lucas Rayala

Hi @Raquel @Raquel Love, that's pretty close. Add the Collect function to get the group your looking for. Use this:

=COUNTM(DISTINCT(COLLECT([Meeting Attendees]:[Meeting Attendees], [Meeting Date]:[Meeting Date], DATE(2023, 11, 2))))

Raquel Love

Thanks @Lucas Rayala. I tried this formula and got an unparseable error message - any ideas on potential update?

Genevieve P.

Hi @Raquel Love

Can you post a screen capture for what you're seeing, with the formula open in Smartsheet?

This type of error can sometimes mean the column name isn't properly typed out or there's an extra ) somewhere.

Lucas Rayala

Also, you shouldn't need the "COUNTM" function with the DISTINCT(COLLECT) combo of functions as there wouldn't be any blanks. Please do provide a screenshot as suggested by Genevieve, but also try changing the COUNTM to a simple COUNT. Sorry about the late reply! @Raquel Love

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