what data redundancy is and what it does.
Structured Query Language (SQL) - GeeksforGeeks
Data Model | Types of Database Models in Database Management System(dbms) with example
Lec-56: SQL Queries and Subqueries (part-2) | 2nd Highest Salary | Nested Queries | DBMS
Basic Operators in Relational Algebra - GeeksforGeeks
1NF 2NF 3NF DBMS Hindi