DATABASE FUNDAMENTALS
WHAT IS DATABASE MANAGEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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one-directional
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bidirectional
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multi-directional
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none of the above
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Detailed explanation-1: -How do you translate business rules into data model components? As a general rule, a noun in a business rule will translate into an entity in the model, and a verb (active or passive) associating nouns will translate into a relationship among the entities.
Detailed explanation-2: -The connections between entities in a data model are called relationships, and relationships reflect business rules. Relationships between entities can be one-to-one, one-to-many, or many-to-many. The relationship between products and vendors can illustrate a one-to-many relationship.
Detailed explanation-3: -A business rule is a statement that imposes some form of constraint on a specific aspect of the database, such as the elements within a field specification for a particular field or the characteristics of a given relationship.
Detailed explanation-4: -Three well-known data models of this type are relational data models, network data models and hierarchical data models. The relational model represents data as relations, or tables.