Identifying Duplicate Values in an Excel List

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While working with a large Excel worksheet or consolidating several small spreadsheets into a bigger one, you may find lots of duplicate rows in it. If necessary, choose another range of cells by clicking Collapse button in the Applies to popup window temporarily hide it. I need to show in sheet1 how many time the client bought credit looks at the duplicated in sheet2. The active cell is the one cell in the selected range that is not shaded.

This formula combines all the cell values as a single string. First column has the class name, the second has the teacher's name and the third has another teacher's name. The problem here is it picks only the 1st mentioned Remarks Correct for both the duplicates. If you want to compare not simply 2 columns, but 2 tables by two or more matching columns, you need to select the entire first table on this step.

Identifying Duplicate Values in an Excel List

It will take you about 10 minutes to read this article and in the next 5 minutes or even faster if you choose the 2nd solution described in the article you will easily compare two Excel columns for duplicates and remove or highlight the found dupes. Okay, the countdown is started! Excel is a very powerful and really cool application for creating and processing large arrays of data. Now that you have lots of workbooks with a pool of data, or maybe just one huge table, you may want to compare 2 columns for duplicates and then do something with found entries, for example delete duplicate rows, color dupes or clear the contents of duplicated cells. These two columns may be located in one table, contiguously or non-contiguously, or they may reside in 2 different worksheets or even workbooks. Say, you have 2 columns with people names - 5 names in column A and 3 names in column B, and you want to compare data between these two columns to find duplicates. As you understand, this is bogus data just for a quick example; in real worksheets you usually have thousands and tens of thousands of entries. Variant A: Both columns are located on one sheet, in a single table: Column А and Column B Variant B: Two columns are located on different sheets: Column A in Sheet2 and Column A in Sheet3 The built-in Remove Duplicate tool available in Excel 2016, Excel 2013 and 2010 cannot handle this scenario because it cannot compare data between 2 columns. Furthermore, it can only remove dupes, no other choice such as highlighting or coloring is available, alas :-. I use the absolute reference on purpose, in order for the cell addresses to remain unchanged when copying the formula. In the latter case, you will have empty cells next to cells for which duplicates were not found, I believe such presentation is more convenient for data analysis. To do this, put the cursor to the lower right corner of cell С1, and the cursor will change to a black cross, as shown in the image below: Click the left mouse button and holding it down drag the border downward selecting all cells where you want to copy the formula. When all needed cells are selected, release the left mouse button: Tip: In large tables, it is faster to copy the formula using shortcuts. Click on cell C1 to select it and press Ctrl + C to copy the formula to clipboard , then press Ctrl + Shift + End to select all non-empty cells in Column C , and finally hit Ctrl + V to paste the formula into all selected cells. Working with found duplicates Perfect, we have found the entries in the first column Column A that also exist in the second column Column B. Now we need to do something with them : It would be rather ineffective and would take too much time to look through the entire table and review the duplicate entries manually. There are much better ways. Show only duplicated rows in Column A If your columns do not have headers, you need to add them. As an example, let's change the background color of duplicated rows to bright yellow. Of course, you can change the background color of cells using the Fill color option on the Home tab, but the advantage of the Format Cells dialog box is that it lets you make all formatting changes at a time: Now you definitely won't miss a single duplicated cell: Remove duplicates from the first column so that only cells with duplicated values show up, and select all those cells. If 2 columns you are comparing are located on different worksheets, i. As you can see, only the rows with unique values are left: If 2 columns are located on one worksheet, next to each other adjacent or not touching each other nonadjacent , the removing duplicates is a bit more complex. We cannot delete entire rows that contain duplicate values because this would delete corresponding cells in the 2nd column too. Though it's very time-consuming and boring process to write and copy the formula, apply and clear the filter every time you need to compare 2 columns in your worksheets. The other solution I am going to bring to your attention is much simpler and will take just a fraction of time we've spent on the first method. If you want to compare not simply 2 columns, but 2 tables by two or more matching columns, you need to select the entire first table on this step. The smart wizard will select the 2nd column automatically, if for some reason this does not happen, click on the Select range icon. Check the checkbook next to Column A and select Column A from the drop-down list in the right-hand part of the wizard, under Table 2 columns: Tip. You can compare not only 2 columns but 2 tables with multiple columns. At that, you can compare by several pairs of columns at the same time, e. Column A in the 1st table against Column A in the 2nd table, and Column B in the 1st table against Column D in the 2nd table, etc. You can choose to delete the duplicate entries, move or copy them to another worksheet, add a status column the result will be similar to our first solution with Excel formulas , highlight duplicates, or simply select all cells with duplicated values: Tip. Do not choose to delete duplicates especially if you are using the wizard for the first time. You'd better choose to move dupes to another worksheet, because when you work with real data you may want to cast at least a quick glance at the entries recognized as duplicates, especially if you are comparing by several columns in large tables. It may happen that you accidentally forgot to select a certain column when specifying matching columns, and if that column contained unique data, it would be really frustrating to irretrievably lose it. What we have now is a nice, clean table with no duplicates: Remember the previous solution and feel the difference : It is fast and easy indeed to dedupe your worksheets using the Duplicate Remover add-in. In fact, it will take you less time than you've spent on reading this article. The clock is ticking, so hurry up and! If you have questions or something is left unclear, please drop me a comment and I'll happily elaborate further. Thank you for reading! Please have a look at the variant described in this blog post, it may help: If you want to quickly find the previous occurrence, the easiest way is apply Autofilter to your table and filter according to the necessary value when it is needed. This variant is more convenient then using Find All in the column. Hi, I want compare two sheets data ALL Columns into another sheet. I don't know how it is possible please can anyone solve it. Sheet1: ID SALARY CLEAVE SLEAVE 12 1000 8 5 11 2000 5 6 10 1500 4 7 Sheet2: ID SALARY CLEAVE SLEAVE 12 1000 8 5 11 2000 9 6 10 2500 4 7 I want the result like this given below,If both of the sheet have same data that will not display into the result sheet otherwise if there any difference. Sheet 3:RESUT RESULT 11 2000 5 6 11 2000 9 6 I want to the result like above. I'm comparing ISBN's, and column a contains multiple values in each cell. Column b contains one value ISBN per cell. So, I really need to find cells in column a that partially match the value of cells in column b. Hi, I have two columns as below. Would like to know how I can get the unique data from these two columns in a third column. I have provided below the sample data for merging and the expected data as well. Below is the data Column A Apple Orange Banana Strawberry Grapes Column B Plums Apple Banana Grapes Blueberry Iam looking at the below data in COlumn C Column C Apple Orange Banana Strawberry Grapes Plums Blueberry Would be good if you could share me the excel formula for this. I have 2 columns with some duplicate data within one column and need to eliminate the duplicated portion of the second column. Can anyone please tell me how to do this without manually doing so? See below example; the S. Art Pecca Comunale Co. United Way Of St. Sam Gild United Way Of St. Paul Basley's Point Sea-Doo Mr. Paul Innoce Beesley's Point Sea-Doo Please help! I have data in 2 columns on same worksheet. There is a portion within the second column that is duplicate of the first and I need to eliminate the portion that is duplicate of the first. Is there a way to do this without having to go through the excel spreadsheet manually and do? See example below: Column 1 Column 2 S. Art Stuart Comunale Co. United Way Of St. Klye Gilt United Way Of St. Paul Bosley's Point Sea-Doo Mr. Pete Intake Bosley's Point Sea-Doo HI Alex, I am not sure if I am missing or not understanding a step but I am trying to compare addresses. I have set up my addresses on two different sheets in Excel and I see it populate the duplicated lists but when I compare my original list to the list that shows duplicates, I see that not all of the addresses are accurately marked. Do you have any additional pointers? Hello, Katie, For me to understand the problem better, please send me a small sample workbook with your source data and the result you expect to get to. Please don't worry if you have confidential information there, we never disclose the data we get from our customers and delete it as soon as the problem is resolved. Please also don't forget to include the link to this comment into your email. I'll look into your task and try to help.

Is there a way to get around this to remove duplicate rows. Repeat this for column D but swap the A and B references in the formula and fill down until the bottom of the column B data. Scanning each column one at a time will resolve any errors here. Hello, Hannah, Please try to solve your task with the help of the tool which is a part of our Ultimate Suite for Excel. Now that you have lots of workbooks with a pool of data, or maybe just one huge table, you may want to compare 2 columns for duplicates and then do something with found entries, for example delete duplicate rows, color dupes or clear the contents of duplicated cells. When all needed cells are selected, release the left mouse button: Tip: In large tables, it is faster to copy the formula using shortcuts. I do no want to delete the duplicates as they essentially only have a PO number the same other details are different. Given the inadequacies of the search tool available, I have multiple duplicates for some of the cases.