PRIMARY KEY Constraint

# Mastering the Primary Key Constraint: Ensuring Data Integrity in SQL Databases In the world of databases, ensuring data integrity is paramount. Imagine a library where multiple books have the same ISBN – chaos would ensue! That's where SQL constraints, and specifically the **Primary Key Constraint**, come to the rescue. They act as guardians, ensuring that each record in your database is uniquely identifiable. This comprehensive guide will equip you with the knowledge and practical skills