Question

What are the three levels of DBMS Architecture..?? Plz help me in detail..

Answer 1

External level
Conceptual level
Internal level

Answer 2

Can u plz explain them in detail..!!

Answer 3

Internal level describe how data is internally store in memory.

External level is a abstract representation of data and based on views.e.g in a company employees ,manager have different views of database according to access authorities that they have.

Conceptual level is a logical representation of database,what is stored and relationship among them . Conceptual level is used by DBA to control entire database.

Answer 4

Thanks alott :)