Question at position 50 One solution for a table without any candidate keys is to create an auto-increment attribute.TrueFalse

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BlackTom AI · Accepted Answer

The question asks whether introducing an auto-increment attribute can be a solution for a table that lacks any candidate keys.
Option 1: True. In relational design, a table with no natural or candidate keys can still be uniquely identified by an artificial or surrogate key. Auto-increment columns are a common way to create such a surrogate primary key, ensuring every row has a unique identifier independent of the existing data values. This approach is widely used to establish a stable primary key when meaningful candidate keys are absent.
Option 2: False. This would assert that you cannot use or should not use an auto-increment attribute to solve the problem of lacking candidate keys. However, the practical and conventional solution in many database systems is to add a surrogate key (often auto-incrementing) to guarantee uniqueness and enable reliable row identification, which directly addresses the issue described in the question.
Additional nuance: While auto-increment keys are convenient and effective for uniqueness, they are not a substitute for identifying valid candidate keys for business meaning. They serve as a technical identifier, while the choice of candidate keys remains important for data integrity and natural-key design. Nevertheless, given the scenario of no candidate keys, introducing an auto-increment attribute is a valid and accepted solution.
In summary, recognizing the goal of ensuring each row is uniquely identifiable, option True aligns with common database design practices, whereas option False contradicts the practical method used in many schemas.

Question at position 50 One solution for a table without any candidate keys is to create an auto-increment attribute.TrueFalse

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