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# How to Find Duplicates in Two Columns in Excel?

Are you an Excel user looking for a quick and easy way to find duplicates in two columns? We have all been there, trying to make sense of complex data sets and not knowing how to efficiently compare the two columns. Fortunately, Excel offers a variety of tools to make the process of finding duplicates much simpler. In this article, we will look at some of the best methods to find duplicates in two columns in Excel.

## Find Duplicates in Two Columns in Excel

Finding duplicates in two columns in Excel can be a tedious task. With the help of a few simple formulas, however, you can easily find duplicates in two columns in Excel. This guide will demonstrate the different ways to find duplicates in two columns in Excel, and provide guidance on how to use each method.

There are three main methods you can use to find duplicates in two columns in Excel: Conditional Formatting, the COUNTIFS function, and the SUMPRODUCT function. Each method has its own pros and cons and can be used for different purposes. Read on for more information on how to use each of these methods to find duplicates in two columns in Excel.

### Conditional Formatting

The Conditional Formatting tool is a great way to quickly identify duplicates in two columns in Excel. To use this method, select both columns, then select the Conditional Formatting option from the Home tab. Select the Duplicate Values option, and choose the formatting you want to use to highlight the duplicates.

Once the formatting has been applied, you can quickly scan the columns to identify any duplicates. While this method is quick and easy, it does not provide any additional information about the duplicates, such as the number of times they appear in the columns.

### COUNTIFS Function

The COUNTIFS function is a powerful tool that can be used to find duplicates in two columns in Excel. To use this method, create a new column and enter the following formula: =COUNTIFS(column1,column2). This formula will count the number of times the values in column1 and column2 match.

Once the formula is entered, you can quickly scan the new column to identify any duplicates. The advantage of this method is that it provides additional information about the duplicates, such as the number of times they appear in the two columns.

### SUMPRODUCT Function

The SUMPRODUCT function is another useful tool that can be used to find duplicates in two columns in Excel. To use this method, create a new column and enter the following formula: =SUMPRODUCT(column1=column2). This formula will count the number of times the values in column1 and column2 match.

Once the formula is entered, you can quickly scan the new column to identify any duplicates. Like the COUNTIFS function, the SUMPRODUCT function provides additional information about the duplicates, such as the number of times they appear in the two columns.

### Find Duplicates in Multiple Columns

The methods described above can be used to find duplicates in two columns in Excel. If you need to find duplicates in multiple columns, you can use the same methods, but with a slightly different formula. To find duplicates in multiple columns, use the following formula: =COUNTIFS(column1:columnn). This formula will count the number of times the values in all the columns match.

Once the formula is entered, you can quickly scan the new column to identify any duplicates. This method is especially useful if you need to find duplicates in more than two columns in Excel.

## Top 6 Frequently Asked Questions

### Q1. What is a Duplicate in Two Columns in Excel?

A duplicate in two columns of an Excel worksheet is a value that appears more than once in both columns. For example, if a value appears twice in column A and twice in column B, then it is considered a duplicate. The value can be the same, or it can be different in each column. In either case, it is considered a duplicate.

### Q2. How to Find Duplicates in Two Columns in Excel?

There are several ways to find duplicates in two columns of an Excel worksheet. The simplest way is to use the “Conditional Formatting” feature in Excel. Select the two columns that you want to compare, then click the “Home” tab and choose “Conditional Formatting”. Choose “Highlight Cells Rules” and then “Duplicate Values”. This will highlight any duplicate values in the two columns.

### Q3. What is the ‘COUNTIF’ Function in Excel?

The COUNTIF function in Excel is used to count the number of cells that meet a certain criteria. For example, you can use the COUNTIF function to count the number of cells in two columns that contain a certain value. To do this, you must enter the range of cells to be counted, followed by the criteria. The criteria can be a specific value, or a logical expression.

### Q4. How Can I Find Duplicates in Multiple Columns in Excel?

To find duplicates in multiple columns of an Excel worksheet, you can use the COUNTIF function. Select the multiple columns that you want to compare, then click the “Formulas” tab and choose “COUNTIF”. Enter the range of cells to be counted, and the criteria. The criteria can be a specific value, or a logical expression. The COUNTIF function will return the number of cells that meet the criteria.

### Q5. How Can I Highlight Duplicates in Multiple Columns in Excel?

To highlight duplicates in multiple columns of an Excel worksheet, you can use the “Conditional Formatting” feature in Excel. Select the multiple columns that you want to compare, then click the “Home” tab and choose “Conditional Formatting”. Choose “Highlight Cells Rules” and then “Duplicate Values”. This will highlight any duplicate values in the multiple columns.

### Q6. How Can I Remove Duplicates in Multiple Columns in Excel?

To remove duplicates in multiple columns of an Excel worksheet, you can use the “Remove Duplicates” feature in Excel. Select the multiple columns that you want to compare, then click the “Data” tab and choose “Remove Duplicates”. This will remove all duplicates from the selected columns, leaving only unique values. You can also use the “Remove Duplicates” feature to remove duplicates from a single column.

### How to find duplicates based on two columns in excel

In conclusion, finding duplicates in two columns in Excel is a relatively straightforward process that only takes a few minutes. By using the built-in Conditional Formatting feature, you can quickly identify which cells are duplicates and take the appropriate action. While this process is not complicated, it can be time consuming, so it is important to be organized and be aware of the various options available to you. Utilizing these tips will ensure that you can find duplicates in two columns in Excel quickly and efficiently.

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