What is the role and application of auxiliary data tables in databases?

Auxiliary data tables (or helper tables) in databases are used to store additional information that is not part of the main data structure but is related to it.

Role and application:

• Storing metadata, such as settings or parameters.
• Supporting many-to-many relationships through intermediate tables.
• Logging changes and data history.
• Separating data for improved performance and ease of management.

For example, in a user management system, the main table stores user data, while an auxiliary data table may contain their settings or activity history.