What is Database

 What is Database?



-The design of a DBMS depends on its architecture.
-Database Architecture done through polices, rules and standards.
-Architecture control that how to store data and how to use data.
-Database Architecture is logically divided into three types.


ONE TIER ARCHITECTURE :

 (simple and easy presentation layer)

  • All in one computer
  • application
  • data 
  • presentation
example: MS Office (word, Excel


TWO TIER ARCHITECTURE :

(client server architecture)

  • Used for Application program that runs of client side
  • clients are direct communication
  • faster communication
  • done by ODBC(OPEN DATABASE CONNECTIVITY)
example: college/ organization

THREE TIER ARCHITECTURE :

(used for WEB APPLICATION)

(internet)

example: Facebook


client-web server-Database server



here, we can see that user is using a social media like Facebook so he will become client and now he will register himself and enter his details then that data will be pass to the web server. This data will be verify and once it is successfully verified it will be saved in database server. 

This figure shows the business logic of three tier architecture. It is used for validation and manipulation of data as well.



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