Thursday, January 12, 2012

How to find duplicates in data

If you need to find the duplicated data in two group of items, just list them in two column in Excel. Place them in Column A and C. Then in column B, use this formula to find which data in column A is the duplicated one.

=IF(ISERROR(MATCH(A1,$C$1:$C$5,0)),"",A1)

The formula above is meant for 5 items.
If you have 100 data in column C, just change the $C$5 value to $C$100.

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