Edger F Codd's Rules
E.F. Codd’s 12 Rules of Relational Databases – Explained Simply By Laxmi Parmanandani | BCA, Semester 3 If you've ever used apps that store data like contacts, shopping lists, or bookings, chances are they use something called a relational database. But how do we know if a database is truly "relational"? That’s where E.F. Codd’s 12 Rules come in. These rules help us check if a database system follows the right principles. Let’s understand who E.F. Codd was and what his rules mean in simple words. Who Was E.F. Codd? E.F. Codd was a computer scientist who worked at IBM. He came up with the idea of relational databases—a way to store data in tables with rows and columns. He created 12 important rules (plus Rule 0) that every Relational Database Management System (RDBMS) should follow. Rule 0: The Basic Rule A system is a relational database only if it follows all 12 rules. So if a system doesn’t follow these rules, it's not a real RDBMS. Rule 1: Information Rule All the...