Relational Data Model Concepts

Relational Data Model: A mathematical approach After reading this article you will start loving Codd for his work on Relational Model for database. His statements are often confusing for example this one. “Given sets S1, S2,…, Sn (not necessarily distinct), R is a relation on these n sets if it is a set of tuples each of which has its first element from S1, its second element from S2, and so on.”  — E F Codd — 1970 A relational database consists of a collections of tables, i.e. In this model, entity sets and relationships all are represented by tables. A row in a table represents a relationship among a set of values(columns). Since a table is a collection of...