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In software engineering, an Entity - Relationship model(ER model for short) is an abstract and conceptual representation of data. Entity-relationship modeling is a database modeling method, used to produce a type of conceptual schema or semantic data model of a system, often a relational database, and its requirements in a top-down fashion. Diagrams created by this process are called entity-relationship diagrams or ER diagrams.
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Wiki User
∙ 11y ago
Wiki User
∙ 11y agothe term Enhanced Entity Relationship(EE-R)Model is used to identify the model that has resulted from extending the original E-R model with new modeling constructs.
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What is network model in DBMS?
network model is a collection data in which records are physically linked through linked lists .A DBMS is said to be a Network DBMS if the relationships among data in the database are of type many-to-many. The relationships among many-to-many appears in the form of a network. Thus the structure of a network database is extremely complicated because of these many-to-many relationships in which one record can be used as a key of the entire database. A network database is structured in the form of a graph that is also a data structure .
What is E-R data model?
The Entity-Relationship Model is often referred to as a semantic data model, because it more closely resembles real world scenarios than, e.g., the relational model. . In the ER model, we model the concept of "Instructors." In the relational model we deal with names and phone numbers. . In the ER model, there is a distinction between entities (objects) and relationships between such entities. In the relational model, both concepts are represented by relations.
Difference between traditional and latest DBMS package?
Traditional FPS and DBMS both are different from each other. In DBMS there is security of data as well as integrated data while this is not in FPS.
Concept of file handling in DBMS?
if we need a modifying ,sreach,delete a file so we need a DBMS
Ppt for functional dependacies in DBMS?
YES
What is the difference between relation and relationship in dbms?
Relationship is purely a construct of the er data model.Relation is a structure of the relational data model.
How to draw Er diagram for college management system in dbms?
answer
In model ER why you need DBMS system?
Because it is very useful in mapping the meanings and interactions of real-world enterprises onto a conceptual schema. Because of this usefulness, many database-design tools draw on concepts from the ER-model. The ER data model employs three basic notation:a.) Entity setsb.) Relationship setsc.) Attributes.
How are database management systems aka DBMS used in banking?
draw a diagram to show bank management system in ER model in database management system
Aggregation in dbms?
•A feature of the entity relationship model that allows a relationship set to participate in another relationship set. • • This is indicated on an ER diagram by drawing a dashed box around the aggregation.
How do you convert an entity relationship diagram to a table?
converting er diagram to table in dbms?
What is difference between network model and hierachical model of dbms in points?
uj
How Dbms er-diagram of employee and department?
each employee works for xactly one department
Make Er diagram of pharmacy company to sell its products in DBMS?
show me some diagrame for better understanding
BCA dbms model question papers of madras university?
yes i want
What are highlights of DBMS?
NA_ what are highlights of advanced DBMS what are highlights of advanced DBMS what are highlights of advanced DBMS
Why DBMS is preferred rather than file processing system?
er diagram for hospital management eitity set are doctor department pesent nurse test
