which tool is best?

[Hi2023]

Hi,

I know this is a very broad question, but I want to see if I can get any ideas before I start.

What is the best way to create 4 different "flags"/types of dups (checking for different set of dups) on an excel file, use Unique, conditional statement, filters, or?

thanks

[Qiu]

@Hi2023 
Do you have  a sample input?