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A supertype/subtype hierarchy is which of the following?

A supertype/subtype hierarchy is which of the following? Correct Answer Each subtype has only one supertype

Two entities are of distinct types if they have no attributes in common. It is possible for entities to have both common and distinct attributes. If they have a common identifier (that is, a common primary key), they have a special supertype-subtype relationship: they are neither distinct nor the same.

Related Questions

What does 'Hierarchy of Authority' means?
1. The lower levels have to pursue the goals laid down by higher levels.
2. The upper levels of hierarchy set the goals to be pursued.
3. The upper level can not take disciplinary action against subordinates.
4. The lower levels have freedom to carry out the operations.
Select the correct answer:
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3. Psychological needs and basic needs
4. Needs of realising one's potential, continued growth
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Which of the following statements are correct?
1. Principle of adequacy of wages state that workers have right to fair wages.
2. Education and training, housing, and food are the three most important aspects of labour welfare.
3. The organisation needs to take care that all the labour welfare measures are uniformly accepted across all the levels of hierarchy.
4. It is the duty of industry to fulfill the unmet needs of the workers and it isthe right of workers to decide the manner in which these needs can be met.
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A supertype/subtype hierarchy has which of the following features?
Of the following taxonomic categories which is the most inclusive (i.e. is the highest in hierarchy)?
Which of the following is the correct hierarchy of biological classification of plants?
Which of the following is not included in Maslow's hierarchy of needs ?