Question 156 – Database-Management-System
May 14, 2024Question 245 – Database-Management-System
May 14, 2024Question 157 – Database-Management-System
The set of attributes X will be fully functionally dependent on the set of attributes Y if the following conditions are satisfied.
Correct Answer: C
Question 247 Explanation:
→ A functional dependency is a constraint between two sets of attributes in a relation from a database. In other words, functional dependency is a constraint that describes the relationship between attributes in a relation.
→ An attribute is fully functional dependent on another attribute, if it is Functionally Dependent on that attribute and not on any of its proper subset.
For example, an attribute X is fully functional dependent on another attribute Y, if it is Functionally Dependent on X and not on any of the proper subset of Y.
→ An attribute is fully functional dependent on another attribute, if it is Functionally Dependent on that attribute and not on any of its proper subset.
For example, an attribute X is fully functional dependent on another attribute Y, if it is Functionally Dependent on X and not on any of the proper subset of Y.
Must satisfied conditions:
i) X is functionally dependent on Y and
ii) X is not functionally dependent on any subset of Y.
X is functionally dependent on Y
X is not functionally dependent on any subset of Y
Both (a) and (b)
None of these
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