9 CLASS SQL Constraints Explained: Primary Keys, Foreign Keys, and Data Integrity

📌 Topics Covered in This Video: Not Null: Ensuring a column cannot be left empty during data insertion. Unique: Preventing duplicate values to ensure every record is distinct. Check: Validating specific conditions (e.g., age = 18) before allowing data entry. Default: Automatically assigning pre-defined values when none are specified. Primary Key: Combining "Not Null" and "Unique" to uniquely identify records. Foreign Key: Establishing relationships between tables to maintain referential integrity. Surrogate Key: Exploring substitute keys and using the MODIFY command. Composite Key: Combining keys from different tables to form a single unique identifier. If you found this tutorial helpful, please hit the LIKE button and SUBSCRIBE for more SQL tutorials and web development content! Have a question about how to apply these rules to your own tables? Drop a comment below and let's discuss. #SQL #DatabaseManagement #LearnSQL #CodingTutorial #TechEducation #DataIntegrity #WebDevelopment