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
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. :)
There may be a simpler option, but you can use VLOOKUP to check if a value appears in a list (and VLOOKUP is a powerful formula to get to grips with anyway).
So for A1, you can set a conditional format using the following formula:
=NOT(ISNA(VLOOKUP(A1,$B:$B,1,FALSE)))
Copy and Paste Special > Formats to copy that conditional format to the other cells in column A.
What the above formula is doing: