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What is a primary key in an Entity Relationship Diagram (ERP)?
What is a primary key in an Entity Relationship Diagram (ERP)?
- A symbol used to depict relationships
- A standardized set of symbols to represent attributes
- A unique identifier for each instance of an entity (correct)
- A numerical relationship between entities
How is cardinality defined in an Entity Relationship Diagram?
How is cardinality defined in an Entity Relationship Diagram?
- As the characteristics of an entity
- As the color scheme used in the diagram
- As the numerical relationship between two entities in a relationship (correct)
- As the font size used for labeling entities
What do attributes represent in an Entity Relationship Diagram?
What do attributes represent in an Entity Relationship Diagram?
- Characteristics that describe an entity (correct)
- Real-world objects or concepts
- The visual representation of data entities
- Numerical relationships between entities
In an Entity Relationship Diagram, what does the term 'entity' refer to?
In an Entity Relationship Diagram, what does the term 'entity' refer to?
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What is the function of a visual tool like an Entity Relationship Diagram (ERP)?
What is the function of a visual tool like an Entity Relationship Diagram (ERP)?
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What does the term 'one-to-many (1:N)' signify in an Entity Relationship Diagram?
What does the term 'one-to-many (1:N)' signify in an Entity Relationship Diagram?
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