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Anders didn’t just teach DAX formulas and stacked bar charts. He taught her to think in relationships—to see tables not as dead spreadsheets but as living conversations between customers, products, and time.

Friday came. Derek appeared. "Well?"

By Chapter 3 ("Filters and Slicers"), Maya had transformed her messy Excel files into a single, humming data model. By Chapter 6 ("Measures vs. Calculated Columns"), she made a KPI that blinked red when inventory dropped below safety stock.