Let we understand why this extended feature is needed. We know ER model is used to represent any database in pictorial view so that we can easily understand all about data but it is convenient if the data is not big or complex. But when the data become more complex than than we need to extend some feature in ER model.For...

ER Diagram ER Diagram is a graphical representation of database by using some specific symbols and components. All the components are given bellow. For know about ER Model Entity Entity are real word object that are distinguish from other real word object on the basis of their property or attribute. Example: ...

System Architecture DBMS is a software that handles all access to the database and each of its activities revolves around the database, whatever happens in the database can be seen as foll...

Concept of Data Models Data model can be define as logical set of relationship describing behaviour and nature.  One data model can be distinguish from other on the basis of the way the relation ship among data is define and the way the database is conceptually(logically) defi...

INDEX Database Management System Sno TOPICS 1 Important terms regarding DBMS About Primary Key About Super Key About Candidate Key Schema Data In-dependency Codd's 12 Rules in DBMS 2 Data Models 3 System Architecture of DBMS 4 ER-Diagram ...