Use Excel data validation to prevent duplicate values in a column Your email has been sent Prevent duplicates before they happen by combining a simple function with data validation. Excel has ...

Learn how to create a drop-down list using Data Validation in Excel. Data Validation limits the type of data that can be entered into a cell.

What is the current behavior? While exporting an Excel sheet from the application, the following popup appears upon opening the file: Excel completed file level validation and repair. Some parts of ...

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 ...

The Data Validation feature in Excel 2013 offers a List option to confine selections in a cell to a preconfigured series of values. This selection can further influence the values in another list ...

I only started noticing this problem for a little over a month. I built a taskpane add-in for Excel using office.js for one of our departments at work. For almost 2 years it has been working perfec ...

Just a short post this week, as I have a pretty manic workload at the moment! A few years ago, I did a post on using Data Validation to produce drop-down lists. However, Data Validation allows for ...

In two-dimensional XLOOKUP formulas, it doesn't matter which way around the XLOOKUPs go. In this example, the ID lookup is first in the formula, and the column header lookup is nested. If these were ...