In a Well-Structured Relational Database

question 94

Multiple Choice

In a well-structured relational database,

• A)foreign keys cannot be null.
• B)there must be at least two foreign keys.
• C)every column in a row must be single valued.
• D)one table must be related to all other tables.

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Definitions:

Opportunity Cost

Signifies the advantages that a person, investor, or company forgoes by selecting one option instead of another.

Tables

Arrangements of data in rows and columns that systematically display information.

Comparative Advantage

The ability of an individual, firm, or country to produce a certain good at a lower opportunity cost than its trading partners.

Total Output

Total output refers to the total value of all goods and services produced in an economy over a specific period.