The data dictionary contains the definitions for all tables and fields in a database and is essential for both database management and understanding the data structure.
The data dictionary contains the definition for each and every table and field in the database. This critical component of a database system describes the structure of the database, including information about tables, columns, data types, and constraints. It is used not only by the database management system (DBMS) to manage the data but also by developers and database administrators to understand the organization of the data.