18 Questions
What is the primary purpose of data modeling in database design?
To serve as a bridge between real-world objects and the computer database
What is a characteristic of the data modeling process?
It is an iterative, progressive process
What is an entity in the context of data modeling?
Anything about which data will be collected and stored
What is the primary tool used to represent data models?
Entity Relationship Diagram (ERD)
What is the purpose of a data model?
To create a blueprint of the database
What are the basic building blocks of all data models?
Entities, attributes, relationships, and constraints
What is an entity instance in data modeling?
A specific occurrence of an entity
What type of relationship exists between a painter and their paintings?
One-to-many
What is the primary purpose of constraints in data modeling?
To ensure data integrity
What is a business rule in data modeling?
A brief, precise, and unambiguous description of a policy or procedure
How do you properly identify entities, attributes, relationships, and constraints in data modeling?
By clearly identifying the business rules for the problem domain
What is an example of a one-to-one relationship in data modeling?
A retail company’s management structure requiring a single employee to manage each store
What is the relationship between a customer and an agent according to the given example?
A customer can be served by only one agent
What is the primary source of business rules according to the text?
Direct interviews with end users
How do verbs translate into data model components?
Into relationships among entities
What is the purpose of asking two questions when identifying the type of relationship?
To determine the bidirectional nature of the relationship
What is the naming convention for attributes in a data model?
Prefixing the attribute name with the entity name
What is the purpose of translating business rules into data model components?
To understand the problem domain
Test your understanding of data models and data modeling, the first step in designing a database. Learn about the abstraction of real-world objects and events, and how to represent complex data structures in a simple, graphical way.
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