In excel, how do I enter unique cell information in a column

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

I do not want to input duplicate data in any cell of the same column, in an
excel spreadsheet.
 
Highlight your range,

In the Menu Data>Validation>Under Allow: select Custom>Under Formula:
=COUNTIF($A$1:A1,A1)=1
click OK
 
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