Скачать или смотреть SQL Constraints Explained in PRIMARY KEY, FOREIGN KEY, UNIQUE, CHECK, NOT NULL, DEFAULT | Full Guide

Welcome to Opencluster Academy! 👋
In this video, we’ll learn about SQL Constraints — one of the most important and commonly asked topics in SQL interviews.
If you’re a beginner or preparing for SQL interviews, this video will help you understand every constraint with practical examples in the easiest way possible. 💻

📘 What You’ll Learn:

✅ What are SQL Constraints
✅ Why Constraints are important in SQL
✅ Types of SQL Constraints:

NOT NULL Constraint

UNIQUE Constraint

PRIMARY KEY Constraint

FOREIGN KEY Constraint

CHECK Constraint

DEFAULT Constraint

💡 Real-Time Examples:

🔹 Creating tables with constraints
🔹 Inserting valid and invalid data
🔹 Understanding constraint violation errors
🔹 Difference between Primary Key and Unique Key
🔹 Importance of Foreign Key in relational databases

🚀 Perfect For:

Students preparing for SQL Interview Questions

Database Developers & Analysts

Beginners learning SQL from scratch

💬 Practice Task:

👉 Implement all examples shown in this video
📸 After completing, share your output screenshot in the comments!
👍 Don’t forget to Like, Share, and Subscribe to Opencluster Academy for more easy and practical tutorials!

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