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Default how to find duplicate numbers?

I have a sets of data that goes:

000 820 2184
123 421 8952
and so on.. am i able to set a command/function that can prevent duplicate
sets at columns and rows level ( as in all 10 numbers)?

hope this is clear enough.. thnx !

Cheers,
Melanie
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Default how to find duplicate numbers?

One way for this:
.. set a command/function that can prevent duplicate
sets at columns and rows level ...?


Assume input range is A1:C3
Select the range A1:C3 (with A1 active)
Click Data Validation
Allow: Custom
Formula: =COUNTIF($A$1:$C$3,A1)<2
Click OK

Test it out .. the validation will reject any attempt
to input duplicates anywhere within A1:C3
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"Melt" wrote:
I have a sets of data that goes:

000 820 2184
123 421 8952
and so on.. am i able to set a command/function that can prevent duplicate
sets at columns and rows level ( as in all 10 numbers)?

hope this is clear enough.. thnx !

Cheers,
Melanie

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