Tired of managing security three different ways for SQL, Spark, and Power BI? Microsoft Fabric's OneLake Security changes the game with a single unified layer that enforces table, row, column, and folder-level access control across every engine. Define your security policies once in the portal, and they're automatically enforced whether users query through notebooks, SQL endpoints, or DirectLake reports. This blog walks you through setting up real-world demos with sample data, creating granular roles via UI clicks, and validating enforcement across engines. Ready to simplify your data security? Let's build it step-by-step.