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 ...

We’ll use data validation to prevent duplicate numbers in the Membership Number column. First, enter the following function into cell K3: =COUNTIF(Table1[Membership Number],B3) ...

Real-time data validation tools are also a game-changer. These tools check for errors, duplicates, or inconsistencies as data is entered, allowing immediate corrections. Real-time validation prevents ...

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.