Click on one of the last formula and use the Auditing Toolbar to see where it is looking. We can also use VBA to remove duplicate values from excel columns Remove Duplicate Values From Excel Columns To remove duplicates from the excel column, the user can adopt any of the three well-known methods: Using data tools group, Using the advanced filter in excel, Conditional.
#Excel find duplicate values in a column full
So as you drag the formula down, you think Excel is looking at the full list, but instead it is looking at only the last few cells. VBA Remove Duplicates from Multiple Columns Example 3. If you forget to put $ signs on your formula, Excel may not be looking at the entire area. Your $ signs are not correctĪ very common problem. If the formula does not include the full 2000 rows, Excel will never see the duplicate. Especially when working with templates, formula are created for a specific area (say the first 1000 rows) but over time the template grows to include say 2000 rows. Just because the first few work, it doesn’t mean that your formulas are working over the entire area.
#Excel find duplicate values in a column how to
You can see how to convert text to numbers in the Data Cleanup course. From the Data menu, choose Filter and then select Advanced Filter to open the Advanced Filter dialog box. Press enter and a list of each unique value will show in the column. You will need to correct either one of these to be seen as both text or both numbers before it will ‘see’ the duplicate. Type UNIQUE and click and drag over the cells you want to check for unique data. This may seem minor to you but for Excel these are not the same and therefore it will not recognize it as a duplicate. You may see 123 in the cells, but Excel may see the one as 123 ( a number ) and the other one as “123” (text). This will highlight the existing duplicates and also. See more on this in the Data Cleanup course Text versus Number You can apply a conditional format based on the formula COUNTIF(A1:A20,A1)>1. To see if this the issue, copy the ‘space’ and paste it into the Find/ Replace tool and ‘replace’ it with the more common space character generated by the space button on the keyboard.
You may need to remove these spaces. You can see how to remove spaces in the Data Cleanup course ‘Almost’ SpacesĪ more common problem recently, there is a type of space which Excel sees as a ‘different’ space from the one generated when you click the space bar. Leading spaces will cause a slight misalignment, extra spaces just look slightly too big, but trailing spaces are invisible to humans. Trailing spaces are especially difficult to spot as the human has no reference point. Excel sees the space as an individual character but humans tend to ignore it. (You can combine more columns.) Copy the formula. Let’s enhance the sheet above to see how this works: In cell C2 enter the formula A2&B2.
Check if the one cell has trailing, leading or extra spaces in the cell. Use CountIf () to count the number of combined values. The 3rd button uses a vba routine I put together, that leverages highly off the Dictionary object.Ĭheck out what happens under a range of different scenarios, by running the three macros, then re-clicking the 'Populate/Change Sample Data" button and selecting increasingly larger ranges of numbers.Īs per the results table in the attached file, t he VBA routine is almost always faster.Probably the most common cause of Excel not recognizing duplicates. Now, choose how you'd like Excel to highlight the duplicates in your data, such as in Light Red Fill with Dark Red Text or with a Red Border. Select Highlight Cells Rules on the menu, and then Duplicate Values. Two use Excel's internal routines.the 'remove duplicates' functionality and the 'Advanced Filter' functionality. Click the Home tab, and then click the Conditional Formatting button in the 'Styles' area of the toolbar. There's three buttons that trigger different approaches to remove duplicates. Go to HOME > Styles > Conditional Formatting > Highlight Cells Rules and. This populates the whole of column A with random numbers between 1 and whatever number you just specified. To highlight duplicate rows, first select cells from A1 to A9. If you click the "Populate/Change Sample Data", an input box comes up asking for a number. To demonstrate, check out the attached file. This means that a hand-rolled VBA routine optimized to a particular data source or scenario can be many times faster than an internal Excel routine. Many of Excel's routines or functionality are optimized to work on what MS might think is the most common scenario that users are likely to face. It depends very much on what you are trying to do, and the nature of the data you are trying to do it on. Mark, your comment that internal functions are quicker than any VBA procedure is not always true, including in this case.
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