NOT NULL Constraint in SQL | NOT NULL | SQL |CONSTRAINT |Beginner Friendly SQL Tutorial

Published: 13 April 2025
on channel: SkillUpgrade Academy

Learn what the NOT NULL constraint is in SQL and why it's important in database design! In this video, I’ll explain how NOT NULL ensures data integrity, show real-world examples, and demonstrate how to apply it during table creation and modification.

📌 Topics Covered:

What is NOT NULL constraint?

Why use NOT NULL?

How to add NOT NULL in CREATE TABLE

How to add or modify NOT NULL using ALTER TABLE

Common mistakes and how to fix them

✅ Perfect for beginners who want to strengthen their SQL fundamentals.

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