Description: An information schema is a set of read-only views that provide information about the metadata of the database. These views allow users and administrators to gain a clear understanding of the database structure, including tables, columns, data types, constraints, and relationships between entities. Through these views, critical information can be accessed that aids in the management and optimization of databases. Information schemas are essential for the documentation and maintenance of databases, as they facilitate the identification of issues and the implementation of improvements. Additionally, they are valuable tools for developers and data analysts, as they allow them to explore and understand the organization of data without needing to access the underlying tables directly. In various database management systems, information schemas are fundamental for efficient administration and effective use of data resources. Their relevance extends to SQL query optimization, where a clear understanding of the database structure can lead to the creation of more efficient and effective queries, thus improving overall system performance.
