In this article, we will learn how to flag the first duplicate in a range of values. Sometimes we need to identify the first duplicate from the other ones. Finding the first duplicate manually can be tedious or even impossible if you have thousands of rows of data. Don't worry, we have a formula that can mark the first duplicate easily in seconds.
For this article we will be required to use the COUNTIF function and IF function together.
fixed array: fixed array of values.
Value: value for which we need to find the first duplicates that need to be found.
expending_array : Its a referencing type, that extends when copied down.
Here we have the ID records with dates. We need to find the first and rest duplicates in the range separately.
Here the arguments to the function are fed using the cell reference.
Use the formula:
Here is the range that is given as array reference and value is given as cell reference. Press Enter to get the count.
As you can see from the first value returns, the first duplicate means this value as other duplicates. Now copy the formula in other cells using the drag down option or using the shortcut key Ctrl + D as shown below.
As you can see all the different duplicates are marked which proves the formula works fine.
Here are some observational notes shown below.
Hope this article about how to flag the first duplicate from the range in Excel is explanatory. Find more articles on COUNTIF functions here. If you liked our blogs, share it with your friends on Facebook. And also you can follow us on Twitter and Facebook. We would love to hear from you, do let us know how we can improve, complement or innovate our work and make it better for you. Write us at firstname.lastname@example.org
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