Count unique values in a column when conditions in a separate column are met
Let's say I have two columns that look like this:
By glancing at this table, you can see that there are 4 unique values in column B.
What I need is a formula that will count how many unique values exists in column B if the corresponding cell in column A says "red".
I can't quite figure this one out.
Solutions to the Problem Count unique values in a column when conditions in a separate column are met
Assuming your data is in the range A2:B6 with no empty cells within the range.
D2 = red
Enter this array formula** in E2:
** array formulas need to be entered using the key combination of CTRL,SHIFT,ENTER (not just ENTER).
Hold down both the CTRL key and the SHIFT key then hit ENTER.
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