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Highlighting Duplicate Values in Excel 2010

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Uploaded by on May 28, 2011

A quick tip on how to find and highlight duplicate values in Excel 2010. Aqueity offers a full range of IT services, support, and solutions for small and medium sized businesses in the Chicago area. Call Aqueity at (630) 971-0602 or visit us at http://www.aqueity.com.

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  • I will create a video in the near future which will show the "defined names" work around which can allow highlighting duplicates in mulitple sheets.

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  • For example, suppose you want to make cell A1 on Sheet1 red if that cell's entry is not found on a list on Sheet2, cells B1:B10. If you tried to use the formula =COUNTIF(Sheet2!$B$1:$B$10,A1)­=0 as your formula, you would receive an error message from Conditional Formatting. To get around this error, create a defined name called MyList which refers to the range =Sheet2!$B$1:$B$10 and use the name in your custom formula:

    =COUNTIF(MyList,A1)=0

  • Custom functions in Conditional Formatting cannot reference cells in other worksheets in the same workbook, and cannot reference cells in other workbooks. However, you can get around this limitation by using defined names. Create a "defined name" which refers to the list in the other workbook or worksheet, and then use that name in your custom function.

  • I need to know how to check duplicates in a workbook with several worksheets. Basically making sure there are no repeats in times that are entered into the buisness form for each sheet. There could be up to 10 sheets in the workbook and would be wonderful to be able to check them all quickly for duplicates. Thank you for your help!

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