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

Question

anonymous · Answer

External level
Conceptual level 
Internal level

anonymous · Answer

Can u plz explain them in detail..!!

anonymous · Answer

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.

anonymous · Answer

Thanks alott :)