# count unique entries if criteria matches

#### mattmac75

##### New Member
How can I count the unique entries of Sheets1A:A but only when the entries of Sheets1N:N match Sheets2A3

### Excel Facts

How to find 2nd largest value in a column?
MAX finds the largest value. =LARGE(A:A,2) will find the second largest. =SMALL(A:A,3) will find the third smallest
use countif or countifs

How do I capture only the unique values and add them up

In the example below I would like to have a total of the unique entries in (A:A) for week 27(B:B) from Sheet1, This would be based on Sheet1 B:B entries matching
Sheet2 A1

Sheet1

A B
1 PMC15994AZ 26
2 PMC15432AZ 27
3 PMC11779AZ 27
4 PMC14694AZ 27
5 PMC14694AZ 27

Sheet 2

A B
1 27 Total number of unique values from Sheet1 A:A

In C1 of Sheet2 control+shift+enter, not just enter:
Rich (BB code):
``````
=SUM(IF(FREQUENCY(IF(Sheet1!\$A\$1:\$A\$5<>"",
IF(Sheet1!\$C\$1:\$C\$5=\$B1,MATCH("~"&Sheet1!\$A\$1:\$A\$5,Sheet1!\$A\$1:\$A\$5&"",0))),
ROW(Sheet1!\$A\$1:\$A\$5)-ROW(Sheet1!\$A\$1)+1),1))
``````

Adjust to suit but avoid using whole column references in this type array-processing formulas.

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