Which is an example of an operation that can be performed using ETL but not declarative schema mapping? (A) Caching results (B) Data profiling (C) Sharing work among operators (D) Precomputing

Types of database architectures

A Database Architecture represents the Database Management System’s (DBMS) design (schema). The DBMS architecture makes it easy to understand the components involved in the database system and their relations. The DBMS architecture may vary based on the system on which it runs. Some systems contain both client and server machines whereas some run only on a server machine. Based on the architecture, the system can be classified as centralized, decentralized, or hierarchical.