Which of the following is not true of MUST constraint?
A)It may be needed in ternary relationships to enforce special business rules.
B)It can be expressed directly in a relational model.
C)It must be enforced by program code.
D)It requires that one entity be combined with another entity.

Question

Quizplus · Accepted Answer

MUST constraints, which are used to enforce certain business rules, cannot be directly expressed in the relational model. They typically require additional mechanisms, such as program code or triggers, to enforce the rules.

Which of the Following Is Not True of MUST Constraint