If you wish to count the same or duplicate values in a column only once in Excel or the count of occurances of duplicate values, read this article.

By using the Highlight Cells Rules, you can highlight duplicate cells in your Excel worksheet to avoid confusion and mistakes.

Microsoft Excel is perhaps the most powerful spreadsheet application you can buy. But it also has some simple functions, like finding duplicates in data.

Unfortunately, there’s no built-in validation rule that recognizes a duplicate value, so you’ll need to combine the feature with Excel’s COUNTIF () function.

If you want duplicate values to stand out in an Excel spreadsheet, you can choose between two conditional formatting rules.

How to Use Excel to Show Only Duplicate Values. Business issues such as incorrect transactions, data entry errors, technical glitches and poor system design may cause duplicate values in your data ...

How Can I Merge Two Columns of Data Using Microsoft Excel and Eliminate Duplicate Values?. There are two situations in which you might need to merge two columns of data in Excel 2013.

You can remove duplicates in Excel in a few steps; duplicates can create problems when you're dealing with data. Excel provides an easy tool that removes duplicate values for you, but it can only ...