Is PRIMARY KEY a Combo of Constraints? 🤔#sqlinterviewquestions #sqlshorts #sqltips

Ever wondered what exactly a PRIMARY KEY is in SQL?
Is it just a unique constraint? Does it automatically include NOT NULL?

In this short video, we explain:
✔️ What a PRIMARY KEY really is
✔️ How it combines UNIQUE and NOT NULL constraints
✔️ Why it’s crucial for database design

Perfect for SQL beginners and interview prep!
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Видео Is PRIMARY KEY a Combo of Constraints? 🤔#sqlinterviewquestions #sqlshorts #sqltips канала en