2.1- Introduction To E-R Model In DBMS | What Is E-R Model In DBMS | Entity Relationship Model DBMS скачать в хорошем качестве

2.1- Introduction To E-R Model In DBMS | What Is E-R Model In DBMS | Entity Relationship Model DBMS

2.1- Introduction To E-R Model In DBMS | What Is E-R Model In DBMS | Entity Relationship Model DBMS Please Follow Playlist For Complete Chapter - Link Is Under Description PLAYLIST: DBMS - Data Base Management System Tutorials In Hindi | GATE- NET- DBMS Lectures in Hindi    • DBMS Complete Syllabus- All University exa...   gate dbms lectures in hindi, ugc net dbms lectures in hindi, gate dbms lectures, ugc net dbms lectures, gate dbms tutorials in hindi, ugc net dbms tutorials in hindi, gate dbms tutorials, ugc net dbms tutorials, #gatedbmslecturesinhindi, #ugcnetdbmslecturesinhindi, #gatedbmslectures, #ugcnetdbmslectures, Introduction The entity-relationship (E-R) model was introduced by Chen in 1976. He described the main constructs of the E-R model i.e., entities, relationships and their associated attributes. The E-R model continues to evolve but there is not yet a standard notation for E-R modeling. E-R model is mainly used for conceptual data modeling. It is popular due to the factors such as relative ease of use, CASE tool support, and the belief that entities and relationships are natural modeling concepts in the real world. The E-R model is mainly used for communication between database designers and end users during the analysis phase of database development. This E-R model is a representation of the structure and constraints of a database that is independent of the DBMS and its associated data model that will be used to implement the database. In 1980’s many new database applications like Computer Aided Manufacturing (CAM), Computer Aided Design (CAD), Computer Aided Software Engineering (CASE), Digital publishing, World Wide Web (WWW), Telecommunication applications etc., were introduced. The basic E-R modeling concepts were no longer sufficient to represent the requirement of these newer and complex applications. Basic E-R model was not capable to represent additional semantic modeling concepts. Database designers and practitioners introduced a new model named as Enhanced Entity-Relationship Model (EER) which includes the basic E-R model concepts with additional semantic concepts like : Specialization Generalization Categorization. 1.13- 2 Tier Architecture of DBMS | 2 Tier Client Server Architecture Of DBMS In Hindi | Gate DBMS    • 1.13-  2 Tier Architecture of DBMS | 2 Tie...   1.14- 3 Tier Architecture Of DBMS | 3 tier Client Server Architecture In DBMS | Gate Net DBMS Videos    • 1.14- 3 Tier Architecture Of DBMS | 3 tier...   1.15- What Are Data Models In DBMS | Data Models And Their Characteristics in DBMS | DBMS- NET GATE    • Видео   Notes Link: http://www.tutorialsspace.com/Downloa...