Converting a Many-To-Many Unary Relationship into a Relational Database from an E-R

question 49

Multiple Choice

Converting a many-to-many unary relationship into a relational database from an E-R diagram ____.

• A) can be done by adding another copy of the unique identifier of the single entity's table into the same table with a different attribute name
• B) can be done by splitting the attributes of the single entity into two tables, each with its own copy of the unique identifier
• C) requires the creation of an additional table beyond the one that represents the single entity in the relationship
• D) a & b above
• E) a & c above

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Definitions:

Heritability Coefficient

A statistical estimate that indicates how much of the variation in a trait within a population can be attributed to genetic differences among individuals.

Genetic Influences

The impact of genes inherited from one's parents on physical traits, behaviors, and susceptibility to certain conditions.

Behavior Geneticist

A scientist who studies the genetic and environmental influences on behaviors, often through twin studies and adoption studies.

Heritable

Referring to traits or characteristics that can be passed from parents to their offspring through genes.