How to assign serial number to duplicate or unique values in Excel?
If you have a list of values which contains some duplicates, is it possible for us to assign sequential number to the duplicate or unique values? It means giving a sequential order for the duplicate values or unique values as following screenshot shown. This article, I will talk about some simple formulas to help you solving this task in Excel.
Assign serial number to duplicate values with Formula
Assign serial number to unique value with Formula
Assign serial number to duplicate values with Formula
To order the duplicate values, please apply the following formula:
Enter this formula: =COUNTIF($A$2:A2,A2) into a blank cell beside your data, and then drag the fill handle down to the cells which you want to apply this formula, and the cell values have been assigned based on the duplicate values, see screenshot:
Assign serial number to unique value with Formula
To assign serial number to unique value, the below formula may do you a favor:
Enter this formula: =IF(COUNTIF(A$2:A2,A2)=1,MAX(B$1:B1)+1,VLOOKUP(A2,A$1:B1,2,0)) into a blank cell beside your data, and then drag the fill handle down to the cells that you want to apply this formula, and the unique values have been ordered as following screenshot shown:
Notes:
1. In the above formula, A2 is the cell contain the value you want to assign, B1 is the above cell where your formula located.
2. These formulas also can applied to the values in sorted list, and you will get the following result as you want:
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