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Block duplicate entries in excel

Posted 10 months ago by Alamin Amin Hossain

Un Answered
Alamin Amin Hossain

To prevent duplicate values in excel i am using data validation and COUNTIF function. =COUNTIF(D30:D37,D30:D37). But, After entering that code my code is not working. still accepted the duplicate values. please take a look the below screenshot.



Here is the data validation code sample 


Let's start to solve that issue: 

Fisrt of all your formula is wrong here. simply edit the  data validation  formula :

=COUNTIF(E:E,E:E)

Or Change it to =COUNTIF($E$30:$E$40,E30)=1


After change the code you will get like below


As you can see, this function counts the number of values in the range E30:E40 that are equal to the value in cell E30. Again, this value may only occur once (=1) since we don't want duplicate entries. Absolute values are required here because you want to compare the top of the list to the data that appears below it.



#sikkhon #msexcel



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