Get premium membership and access questions with answers, video lessons as well as revision papers.

Explain the three levels of abstraction.

      

Explain the three levels of abstraction.

  

Answers


Simon
The three levels of abstraction are.
1.External level of abstraction-This is the users view of the database.A database will have different users with different specification,expectations and requirements, and as such each user will have a distinct view of the database.
2.Conceptual level-This is where we have the global or community view of the database. It describes the different entity types,their attributes and relationship among them.
3.Internal level-This is the actual implementation of the database in the computer. This concerns the DBMS used,the structures used,the storage devices, the security mechanisms employed etc.
mzitoh123 answered the question on March 3, 2018 at 12:03


Next: List down the uses of wood as an early source of power
Previous: Explain the factors that have led to the industrial growth in South Africa.

View More Computer Science Questions and Answers | Return to Questions Index


Learn High School English on YouTube

Related Questions