Relational databases store data in tables from "summary" of SQL and Relational Theory by C. Date
The fundamental concept of relational databases is that they store data in tables. Each table consists of rows and columns, with each row representing a particular record or entity, and each column representing a specific attribute or field of that entity. Tables are organized in such a way that they can be related to one another through common columns, known as keys. These keys establish relationships between tables, allowing for the retrieval of related data through queries. The relational model is based on mathematical set theory, with each table representing a relation, or set of tuples. Tuples are the individual rows within a table, each con...
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