There are situations when we need to check for duplicates in excel by multiple column values, suppose we have two columns with first name and last name and duplicate names are not allowed. Your first session is always free.In this post we will see how we could find if there are duplicates by combinations of cells in excel. Still need some help with Excel formatting or have other questions about Excel? Connect with a live Excel expert here for some 1 on 1 help. The COUNTIF and COUNTIFS functions come in handy to count duplicate values in Excel and gain useful insights about the data. The difference between these two steps returns 5, the total count of duplicates including the first instances.Ĭounting duplicates in Excel is a very handy trick when working with large datasets. The resulting 1’s are then summed, and the sum results in 2, which is the number of distinct matches between A2 to A8 with itself. The condition used here is to return a 1 if it is a match and a 0 otherwise. In the second part of the formula, the COUNTIF function is used to count the total matches in the range A2 to A8 with itself, and we nest all of this inside an IF function. In the first step, the ROWS function counts the number of rows between A2:A8, which is 7. This formula can be broken down into two parts. Here we used the ROWS, SUM, and IF functions along with the COUNTIF function and apply it as an array function. To count the duplicate values including the first occurrence:
This will show the total count of duplicate values in the column A without the first occurrence.
Assign the formula =COUNTIF(B2:B8,"Yes") to cell B9. This will show the value Yes if the entry in A2 is a repeated entry. To find the total number of duplicates without the first occurrence: The next example includes different country names containing duplicates. First, you need to identify all the duplicates in a column. You can count the total of duplicates in a column in two steps. 
How to Count the Total Number of Duplicates in a Column
Assign the formula =COUNTIFS($A$2:$A$8,A2,$B$2:$B$8,B2,$C$2:$C$8,C2) to F2.ĭrag the formula to the cells below with your mouse. Column E has all the unique names for which you will count the duplicate rows. The data has the columns for the student names, age, and genders. In the following example, you will use the student information. You will use the COUNTIFS function to count duplicate rows. The COUNTIFS function lets you count based on multiple conditions. This comes in very handy if you have a large dataset and want to identify duplicate rows for future modification. You can count duplicate rows that have the same values in every cell. The SUM function then adds up these entries to find the count for the duplicate values. The unary operator (–) transforms the values to an array of 0 and 1’s. This results in an array of logical values TRUE and FALSE. The EXACT formula performs a case-sensitive compare for the values in column D with the grades in C2 to C8. Press Ctrl + Shift + Enter to apply the formula as an array formula. To find a case-sensitive count for duplicate values: But you can use a combination of the SUM and EXACT function to get a case-sensitive count for duplicate instances. You won’t get the actual count if you use it to count a case-sensitive duplicate. The COUNTIF function in Excel is case-insensitive. This will show the count of duplicate values without the first instance in column E. To count the duplicate examples from the last example without the first occurrence: You can count the number of duplicates excluding the first entry in the same way as the previous example. Often you might need to calculate the number of duplicates in your data without the first occurrence. How to Count Duplicate Instances excluding the First Occurrence Now you have the count for duplicate grades in column E. Assign the formula =COUNTIF($C$2:$C$8,E2). To find the count of duplicate grades including the first occurrence: Column D has the unique grades for which you are going to count the duplicates. The data contains the student name, age, and grades. The following example includes the data on student grades. How to Count Duplicate Instances Including the First Occurrence In the next sections, you will see some examples related to counting duplicates. 
You might want to include or exclude the first instance when counting duplicates. There are a few approaches counting duplicates. You can count duplicates using the COUNTIF formula in Excel. In this tutorial, you will learn how to count duplicates using this function. You can count duplicate values using the COUNTIF function. Working with large data sets often requires you to count duplicates in Excel.
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