Use Excel data validation to prevent duplicate values in ... The COUNTIF() function counts the number of cells in a range that meet a specific condition. You supply the range and a condition ...

Use data validation to limit choices during data entry. To create a data validation drop-down list in Excel, you need two things: A list of values and a blank cell to use as the data entry cell.

Use the following fixes to resolve this ... Clear all the Data Validation values for the targeted cell or the range of cells. Open the Data Validation table by following the steps provided in ...

Follow the steps below to create a drop-down list using data validation in Excel. If you want to add a message pop up, you can click the Input Message tab and check the checkbox for “Show input ...