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how do not allow a number to be repeated on the same column?
I want to not allow the entry of a number more tan once on the same colunm
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#2
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how do not allow a number to be repeated on the same column?
Select your data range then go to:
Data Validation Settings Allow: select Custom Formula: =COUNTIF($A$1:A1,A1)=1 "christine Helou" wrote: I want to not allow the entry of a number more tan once on the same colunm |
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