Excel: Count Only Once If Another Column Has Duplicates

Question

I am trying to create a formula that will count the number of \"Overdue\" people instead of \"Overdue\" cells. Each person has the multiple rows with their name in it. The c

Answer 1

What you are after is a distinct count. Excel has a function for that in the new Dynamic Array function set, which is in Office 365 Insider builds but not available to everyone. Right now, a distinct count requires a few tricks.

For example, you can create a pivot table with the names in the rows, filter the table to include only values where column X = Overdue and use a CountA() on the result rows.

Answer 2

You are close, but not quite there.

Use a countifs formula like above. Then, create a column next to it with the logic if(countcell>0, 1, 0). This will return 1 if the person has at least 1 book overdue, and 0 otherwise. Then, take the sum of that column.

Formulas

I have provided a screenshots of the code that we would use (the E and F columns are dates). As you can see, the G column counts how many books are overdue. The H column provides a 1 if at least 1 book is overdue for each user. Then, we can simply sum the H column to find the total number of users with overdue books.

If this helps you, please consider choosing this as the answer.