Скачать или смотреть SQL Lecture 3 |Constraints in SQL|Primary, Foreign, Unique, NotNull, Check, Default |Debug with Nitu

Welcome to Debug with Nitu 💻

In Lecture 3 of our SQL Series, we’ll explore one of the most important topics in database design — SQL Constraints.
Constraints help maintain data accuracy, consistency, and reliability by defining rules for table columns.

By the end of this session, you’ll understand how each constraint works and how to apply them in real SQL databases.

💡 Topics Covered:
✅ What are Constraints in SQL?
✅ Types of Constraints
 • NOT NULL Constraint
 • UNIQUE Constraint
 • PRIMARY KEY Constraint
 • FOREIGN KEY Constraint
 • CHECK Constraint
 • DEFAULT Constraint
✅ Syntax & Examples of Each Constraint
✅ Practical Implementation in Table Creation
✅ Summary & Practice Questions

📚 This is Lecture 3 of our SQL Series.
👉 Watch till the end to build a strong foundation in SQL constraints and data integrity concepts.

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