What is the main purpose and principles of operation of relational data storage systems?

Relational data storage systems are designed for organizing, storing, and managing data in the form of tables that are interconnected according to specific rules. The main idea is representing data as rows and columns, where each table corresponds to a particular type of entity.

Working principles:

• Tabular structure: data is stored in tables with clearly defined columns and data types.
• Relationships between tables: implemented through keys (primary and foreign), ensuring data integrity.
• SQL query language: used for selecting, inserting, updating, and deleting data.
• Transactions: ensure the atomicity of operations, supporting data consistency and isolation.

For example, a store database might have tables Customers, Orders, and Products, interconnected through keys, which allows efficient management of information and execution of complex queries.