In an ER-Diagram, relationship cardinality is represented as a:

Question

BlackTom AI · Accepted Answer

The question asks how relationship cardinality is represented in an ER-Diagram, so we evaluate each option in turn.
Option 1: 'Label' — A label is typically used to name entities, relationships, or attributes, but it does not convey the cardinality (how many instances of one entity relate to another). This makes it inaccurate as a representation of cardinality.
Option 2: 'Connector' — A connector (the line linking entities) shows that a relationship exists, but on its own it does not encode the numerical constraints of cardinality (like one, many, or optional). Therefore, it does not answer how cardinality is represented.
Option 3: 'Crow's foot symbol' — The crow's foot notation is the standard graphical method to express cardinality in ER diagrams, indicating the maximum number of related instances (for example, one, many). This directly communicates one-to-many, many-to-many, etc., making it the correct concept for cardinality representation.
Option 4: 'Diamond box' — A diamond symbol is typically used to depict the relationship type itself in an ER diagram, not the cardinality per se. It helps identify the relation, but it does not encode the cardinality constraints.
In summary, options 1, 2, and 4 describe elements related to diagrams but do not represent cardinality, whereas option 3 directly encodes cardinality through the crow's foot notation, which is why it is the standard representation.

BUSI_V 335 101 102 2025W1 Assignment 5 - Database Design, ERDs

In an ER-Diagram, relationship cardinality is represented as a:

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Question at position 49 In an ERD, cardinality specifiesThe range of allowable values for an attributeThe unique identifier for an entityThe minimum and maximum number of instances of one entity that can be associated with instances of another entityThe number of attributes within an entity

Question at position 16 What does a "relationship" in an ERD represent?A specific attribute within an entityThe primary attribute of an entityAn association between two or more entitiesThe unique identifier of an entity

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BUSI_V 335 101 102 2025W1 Assignment 5 - Database Design, ERDs

In an ER-Diagram, relationship cardinality is represented as a:

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类似问题

In an ER diagram, the weak entity is typically depicted with a _________ ___________, and the relationship between the weak entity and the strong entity is shown with a __________ ___________.

In the following diagram, which of the answers below is true?

Identify the minimum cardinality of any E-R Diagram relationship:

in ERDplus a label:

A pair of perpendicular (crossing) lines across a relationship line, next to an entity, indicates that:

Observe the ER Diagram for the ABC Retailer: Which of the following is true according to the ABC Retailer ER diagram?

Question at position 49 In an ERD, cardinality specifiesThe range of allowable values for an attributeThe unique identifier for an entityThe minimum and maximum number of instances of one entity that can be associated with instances of another entityThe number of attributes within an entity

Question at position 16 What does a "relationship" in an ERD represent?A specific attribute within an entityThe primary attribute of an entityAn association between two or more entitiesThe unique identifier of an entity

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希望你的学习变得更简单

In an ER diagram, the weak entity is typically depicted with a ___ _, and the relationship between the weak entity and the strong entity is shown with a _____.