## Extract duplicate values with exceptions

*Article last updated on September 19, 2017*

The formula in cell E2 returns duplicate values from column A but values in column C are excluded from the list.

**Formula in cell E2:**

This post explains how to extract duplicate values using a condition:

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#### Download excel *.xlsx file

how-to-extract-a-list-of-duplicates-from-a-columns-in-excel_version4.xlsx

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Hi Oscar,

i've really tried to understand why this formula - as awesome as it is - wouldn't filter triple (etc.) values in list A. If you enter one more Federer in A he appears in E. The version of this kind of formula without the second countif clause (inside the if that kills the unique values) lists anything that comes up more than once just fine, not only duplicates. Now, i've come up with the following formula, which actually seems to work:

=IFERROR(INDEX($A$2:$A$20;MATCH(0;COUNTIF(E1:$E$1;$A$2:$A$20)+IF(COUNTIF($A$2:$A$20;$A$2:$A$20)>1+(COUNTIF($A$2:$A$20;$A$2:$A$20)-COUNTIF($C$2:$C$3;$A$2:$A$20))*COUNTIF($C$2:$C$3;$A$2:$A$20);0;1);0));"")

But i'm no excel expert, and it has a feel of not being the most elegant solution at all... Any ideas? Thanks so much for all the help!

Hi Stephan

Thank you for telling me and thanks for your formula.

This regular formula seems to work as well: