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How to compare data in two columns to find duplicates in Excel
WEBMethod 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) Select cell B1 to B5. Select Fill in the Editing group, and then select Down.