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

In Microsoft Excel, you can permanently hide columns containing data you don't need to have on show. However, grouping columns is often a better way to achieve the same outcome, especially if you're ...

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 ...