A university identifies a class by subject area and course number.The university has classes Math 101,Math 102,and MIS 101.It takes both subject and course number to identify a single course.The combination of the two fields is called a ________ key.
A)foreign
B)natural primary
C)composite
D)primary

Question

Quizplus · Accepted Answer

A composite key is a combination of two or more columns in a table that can be used to uniquely identify each row in the table. In this case, the combination of subject area (Math or MIS) and course number (101 or 102) together uniquely identify each course, making them a composite key.

A University Identifies a Class by Subject Area and Course