Assume that all seasons of the same series is produced by the same studio. name,season} can be used as a primary key name Game of thrones Game of thrones Game of thrones season 1 2 3 Number Of Episodes 9 10 10 director John M. Mathew F. John M. Studio HBO HBO HBO Studio president Matt D. Matt D. Matt D.
Solution
Introduction-
A) - A constraint that describes the relationship between two sets of attributes in which one set reliably predicts the value of the other sets is known as a "functional dependency" . It is represented as X Y, where X represents a collection of characteristics that can be used to calculate the value of Y. X and Y, the left and right sides of the arrow's respective attribute sets, are referred to as determinant and dependent, respectively. Functional dependencies are a crucial part of understanding advanced Relational Database System principles since they are utilised to mathematically represent relationships between database elements.
Explanation-
Functional dependence (FD) is a constraint that establishes the relationship between one attribute and another attribute in a database management system (DBMS). Functional Dependency aids in preserving the integrity of the database's data. Finding the distinction between excellent and terrible database architecture is crucial.
- As given "Name" , "Season" are used as primary key so the remaining attributes, such as "Number of Episodes," "director," "Studio," and "Studio President," which are functionally dependent on name and season, play secondary roles in the example because they depend on name and season.
- name, season→ { number of episode, director, studio, studio president }→ Here, Name , Season can determine values of fields "Number of episode", "Director", "Studio" , "Studio president" hence a valid Functional dependency.
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