🔒 SQL Constraints Explained | NOT NULL, UNIQUE, PRIMARY KEY & More

In this video, we break down SQL Constraints — the rules that help maintain accuracy, reliability, and integrity of your database. Whether you're a beginner or brushing up on your SQL skills, this tutorial will make constraints easy to understand with real examples!

📌 Topics Covered:

NOT NULL – Prevent empty values

UNIQUE – Avoid duplicate entries

PRIMARY KEY – Uniquely identify each row

FOREIGN KEY – Maintain referential integrity between tables

CHECK – Validate data based on conditions

DEFAULT – Set default values automatically

🧠 Learn through clear explanations and hands-on demos!

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