What Is a Primary Key? | SQL Basics Explained
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YouTubeThe Learning Ledger
What Is a Primary Key? | SQL Basics Explained
In this short video, you’ll learn what a Primary Key is in SQL and why every table needs one. A Primary Key uniquely identifies each row in a table — no duplicates, no null values. This is a must-know concept for SQL learners, DBMS students, and interview preparation. If you’re starting SQL or preparing for tech interviews, this quick ...
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