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Ranking Sales with Power Query Conditional Columns: How I Stopped Using 7-Level Nested IFs and Reduced Classification Errors from 15 to 0 per Month

The Friday night I realized, "I can't even read my own IF formulas anymore." Let me start with the conclusion: if you are using nested IF functions to categorize sales data into ranks like S, A, B, or ...
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I've been using Google Sheets for years, and these features still caught me off guard

I grew up on Microsoft Excel. I knew the formulas, the keyboard shortcuts, the quirks. When I eventually moved most of my day-to-day work into Google Sheets, I assumed it was basically the same tool ...
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[AI x Data Analysis] Excel has evolved! The complete guide to "AI demand forecasting & automated aggregation" to end the copy-paste hell - 5 prompts you can use right away

Good morning, everyone! I am **AI Instructor Shirokuma**, who was unexpectedly appointed as the person in charge of AI education within the company. Today, Monday, June 22, 2026, Tokyo is a bit cloudy ...