Hi, I'm looking for a way to set a data validation in my spreadsheet. The validation is about unique values (like an id properties) in an area for example A1:A50. So in MS Excel I would put a custom validation with formula =COUNTIF($A1:$A50,A1)=1 But how can I do this in OO 2.0.3. I would be very glad if someone can help me.
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