What is the primary function of a Data Dictionary in a database?

The primary function of a Data Dictionary in a database is to define data attributes and relationships. A Data Dictionary acts as a centralized repository that contains detailed information about every element in the database, including the definitions of data types, relationships between tables, constraints on data, and other crucial metadata.

Having this organized information is essential for database management as it ensures that all database users understand the purpose and structure of the data they are working with. By defining data attributes, such as the format of data fields and allowed values, along with the relationships between different entities, such as foreign keys and primary keys, a Data Dictionary provides a clear framework that aids in the consistent use and maintenance of the database.

This foundational knowledge enhances data integrity, promotes better database design, and facilitates easier communication among stakeholders who need to interact with or analyze the database. While other functions mentioned are important in a database system, they do not highlight the core purpose of a Data Dictionary, which is explicitly to define and clarify data characteristics and their connections.