Relational Model
The relational model is a conceptual framework for structuring and managing data in databases, introduced by Edgar F. Codd in 1970. It organizes data into tables (relations) with rows (tuples) and columns (attributes), using mathematical set theory to define operations like selection, projection, and join. This model underpins most modern relational database management systems (RDBMS) by ensuring data integrity, consistency, and efficient querying through structured relationships.
Developers should learn the relational model when designing or working with structured data applications, such as e-commerce platforms, financial systems, or enterprise software, where data integrity and complex queries are critical. It provides a standardized approach to avoid data redundancy and anomalies, making it essential for building scalable and maintainable databases using SQL-based systems like PostgreSQL or MySQL.