SQL Constraints Explained | What is Constraint, Why & NOT NULL vs UNIQUE
Автор: DataWithNeelam
Загружено: 2026-01-14
Просмотров: 0
In this video, we will understand SQL Constraints in a simple and beginner-friendly way.
You’ll learn:
✔ What is a constraint in SQL
✔ Why constraints are important in databases
✔ Different types of SQL constraints
✔ NOT NULL constraint explained with examples
✔ UNIQUE constraint explained with examples
✔ Difference between NOT NULL and UNIQUE
Constraints help maintain data integrity and accuracy in a database. If you’re learning SQL for Data Engineering, Data Analysis, or Data Science, this video will strengthen your foundation.
This tutorial is perfect for:
• SQL beginners
• Students learning DBMS
• Data Analysts & Data Engineers
• Anyone preparing for SQL interviews
📌 Note: This video focuses on NOT NULL and UNIQUE constraints only. Other constraints like PRIMARY KEY, FOREIGN KEY, CHECK, and DEFAULT will be covered in upcoming videos.
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