Description: An internal table in database management systems is a type of table that is fully managed by the database system and is not directly accessible by users. These tables are primarily used to store temporary or intermediate data that is necessary for performing internal database operations, such as executing queries or optimizing processes. Unlike external tables, which allow users to access and manipulate data directly from external sources, internal tables are designed to be invisible and unmanageable by end users. This ensures that the system maintains complete control over data integrity and performance. Internal tables are essential for the efficient operation of databases, as they enable optimized data management, facilitating the execution of complex queries and the processing of large volumes of information. In summary, internal tables are a critical component in the architecture of database systems, ensuring that the system operates smoothly and efficiently without direct user intervention.