Which of the following is not true about subtype entities?
A) Subtypes may be exclusive.
B) The supertype and subtypes will have the same identifier.
C) Subtypes are used to avoid a situation in which some attributes are required to be null.
D) All subtypes of a supertype must have the same attributes.
D
Business
You might also like to view...
Which of the following is NOT an essential health benefit found in qualified health plans?
A) Dental services B) Pediatric services C) Rehabilitative services D) Emergency services
Business
Which of the following is NOT one of the four general classes of consumer goods and services?
A) shopping B) ordinary C) specialty D) convenience E) unsought
Business