Stop Breaking Your Database! Primary vs Foreign Keys Explained [2026]
3:57
YouTubeHemanth SQL
Stop Breaking Your Database! Primary vs Foreign Keys Explained [2026]
PRIMARY KEY vs FOREIGN KEY — this is one of the most confusing SQL topics in interviews. If you mix up PRIMARY KEY and FOREIGN KEY, SQL interviews WILL catch it. In this video, I clearly explain the difference with simple tables and practical examples. 📌 In this video, you’ll learn: • What is PRIMARY KEY? • What is FOREIGN KEY ...
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