Block bad data, duplicates, and incorrect dates with these custom rules.

When multiple data variables are accommodated in a project, the time and spatial grids of those variables must be identical. As such, you must control the data other people enter. That’s when you need ...

Data validation in Excel lets you restrict what can be entered into a cell, whether whole numbers, decimals, dates, or a certain number of characters. However, one of the most powerful capabilities of ...

Excel’s data validation feature offers an efficient way to perform a variety of tasks. This collection of techniques demonstrates several handy ways to put data validation to work. From the ebook: ...

When you work with Excel, you often need to ensure that the data entered into your spreadsheets is accurate and consistent. One effective way to achieve this is by using a drop-down list. In this ...