What is three scheme architecture of DBMS. Explain this architecture with the help of diagram. Also explain physical data independence and logical data independence with the help of example and structure.
Three-Schema Architecture of DBMS The Three-Schema Architecture is a database architecture proposed by the ANSI/X3/SPARC committee that provides a clear separation between the user applications and the database system. It consists of three levels or schemas: the External Schema, the Conceptual Schema, and the Internal Schema. 1. External Schema: The External Schema represents the user […]