Database-Management-System
March 6, 2024Database-Management-System
March 6, 2024Database-Management-System
Question 10 |
An instance of a relational scheme R(A, B, C) has distinct values for attribute A.
Can you conclude that A is a candidate key for R?
Yes | |
No |
Question 10 Explanation:
Because FD’s are defined on the schema itself, not the instance. So, based on the state of the instance we cannot say what holds for schema (there can be many instances for R).
Correct Answer: B
Question 10 Explanation:
Because FD’s are defined on the schema itself, not the instance. So, based on the state of the instance we cannot say what holds for schema (there can be many instances for R).
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