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

Microsoft's spreadsheet program can do way more than you might imagine. These are the hacks and tricks you need to know.

Handle millions of rows by loading queries into Power Pivot, building relationships, and creating measures for fast variance ...

Excel's Custom Views tool lets you create a snapshot of your spreadsheet, allowing you to toggle between layouts.

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Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

A roundup of the most-read Carolyn Hax columns of 2025 includes a woman’s birthday obsession, a flight-tracking in-law and a petty inheritance decision. Carolyn Hax writes a daily advice column for ...

Peggy Noonan is an opinion columnist at the Wall Street Journal where her column, "Declarations," has run since 2000. She was awarded the Pulitzer Prize for Commentary in 2017. A political analyst for ...

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