🔒 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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