SQL Constraints Explained | PRIMARY KEY, FOREIGN KEY, UNIQUE, NOT NULL | SQL Tutorial for Beginners
Автор: Techpile
Загружено: 2025-12-16
Просмотров: 49
In this video, I explain SQL Constraints, which are rules used to maintain data integrity and accuracy in a database.
You will learn what constraints are, why they are important, and how different SQL constraints work in real-world database design.
This tutorial is ideal for beginners learning SQL, DBMS, Data Analytics, or Backend Development, and for students preparing for SQL interviews.
Topics Covered in This Video:
• What are constraints in SQL?
• PRIMARY KEY constraint
• FOREIGN KEY constraint
• UNIQUE constraint
• NOT NULL constraint
• DEFAULT constraint
• CHECK constraint
• Why constraints are important in databases
• Practical examples of SQL constraints
Who Should Watch This Video:
• SQL beginners and students
• Data analysts and developers
• DBMS learners
• Anyone learning database design concepts
Why This Video Is Important:
SQL constraints ensure data consistency, integrity, and reliability. Understanding constraints is essential for creating well-structured and secure databases used in real-world applications.
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