B
Basit
how to apply unique constraint in excel column
Basit said:.. Unique mean that every value in the specified excel column should be
unique. like we do in the databases.
Max said:If you mean, to ensure no duplicates in an input col ..
Assume that inputs will be done in A1 down
Select col A, click Data > Validation,
Allow: Custom
Formula: =COUNTIF(A:A,A1)<2
Click OK
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