A relational algebra

Relational algebra is a mathematical framework used to manipulate and query data stored in databases. It operates on structured data, typically organized in tables (relations), allowing users to perform operations like selecting specific rows, filtering data, combining tables, and arranging results. Through operations such as union, intersection, and difference, relational algebra provides a way to retrieve and analyze data efficiently. It serves as the theoretical foundation for SQL, the language commonly used for database management, enabling users to extract meaningful information from large sets of data systematically.