Prevent duplicates before they happen by combining a simple function with data validation.

Excel's GROUPBY function lets you group and aggregate data based on certain fields in your table of data. It also offers arguments that allow you to sort and filter your data, so you can tailor the ...

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 ...

Excel's data validation feature is more versatile than you might think. Learn how to use literal values, input values, list values, and even formulas to restrict input date values using data ...

Using a formula, you can automate the process of looking for duplicates in your Excel spreadsheets.