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Binary relationship in database?
A binary relationship is a type of relationship between the entities, which links to types of entities in it.
An association between entities is known as?
A relationship.
What is the meaningful relationship between entities?
It is when 2 entities bang each other really hard
Explain entity relationship model with suitable example?
An entity relationship model is a visual representation of the relationships between entities in a database. For example, in a university database, you could have entities such as "Student," "Course," and "Instructor," with relationships like "Student enrolls in Course" and "Instructor teaches Course." These relationships are represented by lines connecting the entities in a diagram, showing how they are connected and interact with each other.
A diagram which shows relationship between two or more entities?
Class diagram
What is relationship in er diagram?
In Database Analysis and Design; the relationship in an ERD can only be mandatory or optional between two entities. Mandatory is where both entities must be present, whereas with optional, you don't always need two entities.
What is the relationship between a factor and a multiple?
A factor of any number is a multiple of that number as for example 3 is a factor of 24 and it is also a multiple of 3 because 3*8 = 24
Why associative entity use in ER model?
Associative entities are used in Entity-Relationship (ER) models to represent relationships between two or more entities. They help to model complex relationships that have attributes of their own. By using associative entities, we can accurately capture the associations between the main entities and represent them in a clear and normalized way.
When do you have to use an intersection entity in database?
An intersection entity is used in a database when there is a many-to-many relationship between two entities. It serves as a bridge table to resolve the many-to-many relationship by breaking it into two one-to-many relationships. Each record in the intersection entity represents a combination of records from the two related entities.
What is the difference between associative entity and relationship with attribute?
An associative entity is used to represent a many-to-many relationship between two or more entities in a database, while a relationship with attribute represents additional information or properties about the relationship itself. In other words, an associative entity helps in resolving many-to-many relationships, while a relationship with attribute adds details about the connections between entities.
What is ER diagram for timetable management system?
An ER diagram is an "Entity Relationship" diagram, which illustrates the relationships between the entities in a data model. A data model for a timetable management system might have entities like Days, Periods and Rooms. Its ER Diagram would then show that a Day is broken down into multiple Periods, and each Room might be used for multiple Periods.
What is relationship in database management system?
A relationship is an association between the instances of one or more entity types. For example, a student may be related to a class by being enrolled in that class. Another example is the link between mother and children. One mother may have many children, but each child has only one mother.A relationship between entities is given a relevant name. For example, there is a relationship between MANAGER and DEPARTMENT. A manager manages the department; on the other hand a department is managed by a manager. This leads to a relationship called "Manages" between MANAGER and DEPARTMENT.Similarly, there is a relationship between AUTHOR and the BOOK. An author writes a book; on the other hand a Book is written by an Author. This leads to a relationship called "Writes" between AUTHOR and BOOK
