Which of the following schemas does define a view or views of the database for particular users?
A. Internal schema
B. Conceptual schema
C. Physical schema
D. External schema
Answer:A
Which of the following schemas does define a view or views of the database for particular users?
A. Internal schema B. Conceptual schema C. Physical schema D. External schema
Explanation: An externally-defined schema can provide access to tables that are managed on any PostgreSQL, Microsoft SQL Server, SAS, Oracle, or MySQL database.