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What is functional dependency in computer terms? |
Functional Dependency
Functional Dependencies A Functional Dependency describes a relationship between attributes in a single relation. An attribute is functionally dependant on another if we can use the value of one attribute to determine the value of another.
Example: Employee_Name is functionally dependant on Social_Security_Number because Social_Security_Number can be used to determine the value of Employee_Name.
We use the symbol -> to indicate a functional dependency. -> is read functionally determines
Student_ID -> Student_Major Student_ID, Course#, Semester# -> Grade SKU -> Compact_Disk_Title, Artist Model, Options, Tax -> Car_Price Course_Number, Section -> Professor, Classroom, Number of Students
The attributes listed on the left hand side of the -> are called determinants. One can read A -> B as, "A determines B".
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First answer by ID3325479442. Last edit by ID3325479442. Question popularity: 67 [recommend question]
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