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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?
Database
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.
What term means between or among?
The term that means "between" or "among" is "inter." It is commonly used as a prefix in various words, such as "international" (between nations) and "interpersonal" (between individuals). This prefix signifies a relationship or connection involving multiple 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
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.
How do you draw E-R diagram for file sharing system?
To draw an Entity-Relationship (E-R) diagram for a file sharing system, first identify the key entities such as Users, Files, and Permissions. Define the relationships between these entities, for example, a User can upload multiple Files, and a File can be shared with multiple Users. Use diamonds to represent relationships and ovals for attributes, ensuring to include primary keys for each entity. Finally, connect the entities with lines indicating the relationships, specifying cardinality (e.g., one-to-many, many-to-many) as needed.
What is the difference between relationship type and relationship instance in database?
In a database, a relationship type defines the abstract structure and constraints of how entities are related, including cardinality and participation rules. In contrast, a relationship instance represents a specific occurrence of that relationship type, linking actual records in the database. Essentially, the relationship type serves as a blueprint, while the relationship instance is the tangible connection between entities in the data.
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?
If you have a many-to-many relationship between two entities you create an intermediate entity between.Now, the relationship between the first entity and intersection entity is one-to-many, and the relationship between the second entity and intersection entity is one-to-many also.
