What is a disjoint less constraint?
A. It requires that an entity belongs to no more than one level entity set.
B. The same entity may belong to more than one level.
C. The database must contain an unmatched foreign key value.
D. An entity can be joined with another entity in the same level entity set.
Answer:A
What is a disjoint less constraint?
A. It requires that an entity belongs to no more than one level entity set. B. The same entity may belong to more than one level. C. The database must contain an unmatched foreign key value. D. An entity can be joined with another entity in the same level entity set.