In a supertype-subtype structure,discriminator attributes ________.
A)are easily represented in a relational design
B)cannot be represented in a relational design
C)require application logic to determine which subtypes correspond to a specific supertype instance
D)Both B and C are correct

Question

Quizplus · Accepted Answer

Discriminator attributes require application logic to determine which subtypes correspond to a specific supertype instance.

In a Supertype-Subtype Structure,discriminator Attributes ________