Finding the exact difference between two dates in Excel may not be the most used feature, but it can be a lot of fun. A classic example is working out someone’s age. It’s not as complicated as it ...

Microsoft Excel provides a function that displays a person's age based on his date of birth. In your business, this function can help you keep track of your workers' ages in a spreadsheet; you'll need ...

Use a CTE that returns the row ID and the result of the DateDiff, then join that to your existing result set? It may or may not be faster, so as always, test it to see.