A Primary Key Used in a Database Is a ________

question 58

Multiple Choice

A primary key used in a database is a ________.

• A) group of rows that are formed to identify a unique table or file
• B) column or group of columns that identifies a unique row in a table
• C) character or byte that represents fields or columns
• D) group of tables or files formed to identify a unique field or row

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Definitions:

Pollution

The introduction of contaminants into the natural environment causing adverse change.

Mass Transit

Public transportation systems that move large numbers of people efficiently across cities and surrounding areas.

Natural Increase

The growth in population size as a result of more births than deaths, excluding migration.

Infrastructure

The fundamental physical and organizational structures and facilities needed for the operation of a society or enterprise.