How to Add Row-Level Security to a Supabase App in Under 30 Minutes

What you'll learn in this guide: What Row-Level Security actually does at the database layer and why it matters for multi-user apps How to enable RLS on an existing Supabase table without breaking active queries How to write SELECT, INSERT, UPDATE, and DELETE policies from scratch How to test that your policies work correctly before going to production The three most common RLS patterns and when to use each one > Prerequisite knowledge: Basic familiarity with Supabase, a working project with at