Trying to count the maximum number of overlaps in at a given time in a series of date ranges. Finding an overlap is easy, but not sure how to cycle through date ranges while keeping a Max count

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This what you’re trying to do?

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likesmart

Omg. You’re trying to count hotel nights for a single room to solve the SPG/Marriott count issues! You’re using excel? Really???

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Sounds like a COUNTIF might be your solution. May need a helper column

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Can you give an example?

Gives you an idea of how data is setup. With expected output being Overlaps

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How many time ranges do you have? I assume you'll need to make a comparison grid that's NxN

@Morgan Stanley Yes! That's exactly it

Op, just threw it together quickly, so make sure you test it out before using

Now I just need to adapt it so it will do this only for cells which share a common uniqueID. Eg -- want to find overlaps by person's name (Joe), but there are multiple names in the table, each with a variable number of rows

And yeah, I'll test it out and see if it handles all of the cases.

Just add the unique ID to the countifs

Yep, just did that. Thanks for the help! Much appreciated.

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