26 Nov 2025

MySQL - The Basics // Learn SQL in 23 Easy Steps Fireship 4.05M subscribers Subscribe Remix

 


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👉 “Why Your SQL LEFT JOIN Is Creating Duplicate Rows (And How to Fix It Fast)”

  🚨 Problem (Relatable Hook) You wrote a simple LEFT JOIN … But suddenly your data is duplicated 😵 👉 Example: Expected: 100 rows ...