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Wyświetlam wyniki dla "functional relations and dependencies
Introduction to functional dependencies A functional dependency is a relationship between two sets of attributes in a database table. It describes how the value of one attribute determines the value of another attribute. Basically, a functional dependency is represented as X → Y, where X and Y are sets of attributes.
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In relational database theory, a functional dependency is a constraint between two sets of attributes in a relation from a database.
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Chapter 11 Functional Dependencies. Adrienne Watt. A functional dependency (FD) is a relationship between two attributes, typically between the PK and other ...
12 cze 2023 · In a relational database management, functional dependency is a concept that specifies the relationship between two sets of attributes where one ...
17 sty 2023 · A functional dependency is a relationship between two sets of attributes in a database, where one set (the determinant) determines the values of ...
A functional dependency is a one-way relationship between two attributes, such that at any given time, for each unique value of attribute A, only one value of ...
9 mar 2024 · Functional Dependency is when one attribute determines another attribute in a DBMS system. · Axiom, Decomposition, Dependent, Determinant, Union ...
A function exists when each x-value (input, independent variable) is paired with exactly one y-value (output, dependent variable). This pairing is also referred ...
A functional dependency is a property of the relation schema (intension) R, not of a particular legal relation state (extension) r of R. That is, a functional ...
In Codd's relational model, the relation name groups together a family of functional dependencies over a set of attributes. For integrity.