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How Many Levels Of Data Abstraction Present?

Answer»

There are three levels of data ABSTRACTION that is PRESENT in database MODEL and these are as follows:

  • physical level: it is the lowest level that describes how data is stored inside the database.
  • logical level: it is the next HIGHER level in the hierarchy that PROVIDES the abstraction. It describes what data are stored and the relationship between them.
  • view level : it is the highest level in hierarch that describes part of the entire database. It allows user to view the database and do the query.

There are three levels of data abstraction that is present in database model and these are as follows:


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