Which of the Following Illustrates the Authors' Preferred Style of Defining

question 47

Multiple Choice

Which of the following illustrates the authors' preferred style of defining a primary key?

• A)CREATE TABLE CUSTOMER (
• CustomerID Integer Primary Key
• LastName Char(35)Not Null
• First Name Char(25)Null
• B)CREATE TABLE CUSTOMER (
• CustomerID Integer Not Null
• LastName Char(35)Not Null
• First Name Char(25)Null
• CONSTRAINT CustomerPK PRIMARY KEY (CustomerID)
• C)CREATE TABLE CUSTOMER (
• CustomerID Integer Not Null
• LastName Char(35)Not Null
• First Name Char(25)Null
• D)either B or C
• E)The authors do not demonstrate a preference for how to define a primary key.

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Definitions:

Allopatric Populations

Populations of the same species that are geographically isolated from each other, leading to potential evolutionary divergence.

Behavioral Preference

Involves the selection of specific behaviors over others by an individual, often influenced by genetic, environmental, and psychological factors.

Genetic Differences

Variations in the DNA sequences among individuals, populations, or species that lead to diversity in traits, behaviors, and susceptibility to diseases.

Isthmus of Panama

A narrow strip of land connecting North and South America, significantly impacting ocean currents and global climate patterns, as well as migration of species.