Lookup in one column

P

petercummins

Hi there,

I havent used Microsft Excel for a few years now so I'm pretty rusty on
the basics.

What I would like to know is whether it is possible to do a lookup on a
column to see if there is more than one cell with the same contents?

For example I have input 1000+ Id's into column A and what to know if
there are any duplicates.

Thanks in advance if you can help me!
 
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