Excel compare two columns and highlight duplicates

Question

I have an excel file with 10,000 rows in column A some values are the same.

Example:

A1 - P7767

A2 - P3443

A3 - P7767

A4 - P8746

A5 - P9435
         


        

Answer 1

Don't wana do soo much work guyss.. Just Press Ctr and select Colum one and Press Ctr and select colum two. Then click conditional formatting -> Highlight Cell Rules -> Equel To.

and thats it. your done. :)