Gross, Operating, and Net Margin Explained with SQL and Worked Examples

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Data analyst Michael Nocito published a technical explainer on August 11, 2026, breaking down the three core profit margins used to assess business performance. Gross margin, operating margin, and net margin each subtract a successive layer of costs from revenue, meaning they always decrease in that order. Dividing profit by revenue converts raw dollar figures into a comparable cents-per-dollar metric, making year-over-year and competitor benchmarking meaningful. The article includes a worked two-year example verified in both SQLite and pandas, alongside SQL code that calculates all three margins in a single query. Nocito also flags two common ways that SQL can silently return incorrect margin figures, and notes that a reported margin reflects accounting profit, not necessarily cash in hand.

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