Validation

hotstew44

New Member
Joined
Aug 19, 2004
Messages
21
i have a row from A1 to Q1 with data in each cell. i was wondering if i could validate this row so when the data is entered in each cell an error will occur if a duplicate entry is entered in this row.
 

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Format cells as date
Select range and press Ctrl+Shift+3 to format cells as date. (Shift 3 is the # sign which sort of looks like a small calendar).
got it thanks!
In Data Validation, did you use something like this?
Allow: Custom|Formula: =COUNTIF($A$1:$Q$1,A1)=1
 
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