How to compare data in two columns to find duplicates in Excel
https://support.microsoft.com/en-us/office/how-to-compare-data-in-two-columns-to-find-duplicates-in-excel-fbeab47c-dd7a-4cf2-8aaf-50fc19d85dcc
WebYou can use the following methods to compare data in two Microsoft Excel worksheet columns and find duplicate entries. Method 1: Use a worksheet formula. Start Excel. In a new worksheet, enter the following data as an example (leave column B empty): Type the following formula in cell B1: =IF (ISERROR (MATCH (A1,$C$1:$C$5,0)),"",A1)
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