Breaking News
You are here: Home / Notes / SEM-2 / DBMS / Data Abstraction Levels OR Explain Data organisation OR View of Data

Data Abstraction Levels OR Explain Data organisation OR View of Data

Data Abstraction Levels  OR Explain Data organisation OR View of Data : –

A major purpose of a database system, user with an abstract view of data it means the system hides certain parts of how the data are stored and maintain. The data abstraction is a mechanism that hides in a complexity. There are 3 levels of data abstraction, (1) Physical Level, (2) Logical Level and (3) Conceptual/View Level.

 data abstraction levels

 

 

Physical Level: –

  • The lowest level of abstraction this level describes how the data are actually stored at the physical level. Complex low level data structures are describe in detail.

 

Logical Level: –

  • It is a middle level abstraction. this level describes how data are actually stored  at Logically.
  • It is a middle level abstraction. This next level of abstraction describes what data stored in a database and what relationship exists among data. The entire database is described in terms of a small number of simple structures. The implementation of the simple structure may involve complex physical level structure but the user is not aware of this complexity.

 

Conceptual/View Level: –

  • The highest level of abstraction describes only the part of the entire database.
  • This Level Describe The Main Features of Database here View Level means How Database Structure is Looking.

Download Paper Solutions from Below Link

About admin

Scroll To Top