## Counting the number of unique values with a criteria in a different column

Hello!
I found the following formula on the net to help me count the number of unique values in column B of my worksheet (the column contains dates)
=SUM(IF(FREQUENCY(B2:B1000,B2:B1000)>0,1))
This gets me the total number of unique values.
However, I also want to separate the answer this formula gives me according to the numbers in column A.
This column contains numbers from 10 to 20 representing our sales area.
How can I modify this formula so that I can get the number of unique values per sales area?
Thanks for any help

## Keys to the Problem Counting the number of unique values with a criteria in a different column

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Hi,
Try this ARRAY formula, see below on how to enter an ARRAY formula.
The formula as posted counts unique values in B for a 10 in column A.
After you ARRAY enter drag down for 11 etc.
=COUNT(IF(FREQUENCY(IF(\$A\$2:\$A\$1000=ROW(A10),MATCH(\$B\$2:\$B\$1000,\$B\$2:\$B\$1000,0)),ROW(\$B\$2:\$B\$1000)-ROW(B2)+1),\$B\$2:\$B\$1000))
This is an array formula which must be entered by pressing CTRL+Shift+Enter
and not just Enter.
If you do it correctly then Excel will put curly brackets
around the formula .
You can't type these yourself.
If you edit the formula
you must enter it again with CTRL+Shift+Enter.

If this post answers your question, please mark it as the Answer.
Mike H

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