COMPUTER APPLICATIONS
DATABASE MANAGEMENT SYSTEMS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Entity-Relationship Diagram (ERD) is a____
|
|
a diagram that describes the relationship (relationship) between relationships
|
|
|
a diagram that describes the relationship (relationship) between attributes
|
|
|
a diagram that describes the relationship (relationship) between entities (entity)
|
|
|
a diagram that describes the relationship (relationship) between multivalued attributes
|
|
|
a diagram that describes the relationship (relationship) between derivative attributes
|
Explanation:
Detailed explanation-1: -When there is a relationship between two entities of the same type, it is known as a recursive relationship.
Detailed explanation-2: -In a relational database a relationship between entities is implemented by storing the primary key of one entity as a pointer or “foreign key” in the table of another entity. There is a tradition for ER/data models to be built at two or three levels of abstraction.
There is 1 question to complete.