33. Describe the three levels of data abstraction?

Answer:

Physical Level - This is the lowest level of data abstraction which describes which describes how the data is to be stored in the database.

Logical level - The level describes the data in the database as well as relations between these database.

View Level- This is the highest level of data abstraction , only some part of actual database is viewed to the user.

Asked In :: iGate Virtusa Accenture Sopra Steria Capgemini

Manorma :: Sat, February 23, 2019, 5:07:02 am

1. Physical level: The lowest level of abstraction describes how data are stored.
2. Logical level: The next higher level of abstraction, describes what data are stored in the database and what relationship among those data.
3. View level: The highest level of abstraction describes only part of entire database.