Learn how GROUPBY passes both subset and full arrays into LAMBDA in Excel, letting you compute percent shares fast and explain results clearly.

Duplicates in the same column are easy to find by sorting or filtering. Duplicates that span multiple columns require a bit of setup, but the solution's not difficult to implement. Finding duplicate ...

Have you ever grouped data in Excel only to find your months sorted alphabetically instead of chronologically? It’s a frustrating quirk of the GROUPBY function, one that can turn a clean dataset into ...

How to use VBA to insert multiple columns in an Excel sheet Your email has been sent Image: iStock/AndreyPopov Must-read Windows coverage CrowdStrike Outage Disrupts Microsoft Systems Worldwide 10 ...