Description: A virtual table is a concept in databases that refers to a structure that does not physically exist in storage but is represented through a view. In SQL terms, a view is a stored query that can be treated like a table. This allows users to access data in a simplified and organized manner without the need to duplicate information. Virtual tables are particularly useful for presenting data from multiple tables coherently, facilitating querying and analysis. Additionally, they provide a layer of security, as access to sensitive data can be restricted by providing views that only show necessary information. In database management systems, virtual tables can optimize query performance, as they can be designed to include only relevant data, thus improving efficiency in data retrieval. In summary, virtual tables are powerful tools that allow developers and database administrators to manage and present data more effectively.
