What is fully functional dependency?
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 Q is fully functional dependent on another attribute P, if it is Functionally Dependent on P and not on any of the proper subset of P.
What is functional dependency in ER diagram?
A functional dependency (FD) has the form of X → Y (reads: X implies Y ), where X and Y are sets of attributes. It means that whenever two tuples are identical on all the attributes in X, they must also be identical on all the attributes in Y .
What is fully functional dependency and partial functional dependency?
A functional dependency X->Y is a fully functional dependency if Y is functionally dependent on X and Y is not functionally dependent on any proper subset of X. A functional dependency X->Y is a partial dependency if Y is functionally dependent on X and Y can be determined by any proper subset of X.
What is functional dependency * Your answer?
Functional dependency is a relationship that exists when one attribute uniquely determines another attribute. If R is a relation with attributes X and Y, a functional dependency between the attributes is represented as X->Y, which specifies Y is functionally dependent on X.
What is functional dependency Mcq?
The correct answer is option 1. Concept: Functional Dependency: A functional dependency is a constraint that specifies the relationship between two sets of attributes where the one set can accurately determine the value of other sets.
What is functional dependency example?
In functional dependency we can obtain the value of another attribute from given attribute. For example, If we know the value of student roll number, we can obtain student address, marks etc. By this, we say that student address and marks is functionally dependent on student roll number.
What is a full dependency in normalization?
A full functional dependency is a state of database normalization that equates to the normalization standard of Second Normal Form (2NF). In brief, this means that it meets the requirements of First Normal Form (1NF), and all non-key attributes are fully functionally dependent on the primary key.
What is dependency diagram in database?
A set of Functional Dependencies for a data model can be documented in a Functional Dependency Diagram (also known as a Determinancy Diagram). In a Functional Dependency Diagram each attribute is shown in a rectangle with an arrow indicating the direction of the dependency.
What is full functional dependency in database management system Mcq?
Functional Dependency MCQ Question 6 Detailed Solution Suppose in relation R, X and Y are two the two subsets of the set of attributes, Y is said to be functionally dependent on X if a given value of X uniquely determines the value of Y. It is denoted by X → Y.