In relation to the closure of attributes, what is a naïve approach to find a closure set?
Understand the Problem
The question is asking about different approaches to finding a closure set in the context of attributes closure in databases. The focus is to identify a naïve approach from the provided options.
Answer
Repeatedly apply functional dependencies to expand the closure set until no new attributes can be added.
A naïve approach to find the closure of a set of attributes involves repeatedly applying the given functional dependencies to add new attributes to the closure set until no more attributes can be added.
Answer for screen readers
A naïve approach to find the closure of a set of attributes involves repeatedly applying the given functional dependencies to add new attributes to the closure set until no more attributes can be added.
More Information
The closure of a set of attributes, denoted as S+, is all the attributes that can be uniquely determined using the functional dependencies applied to S. It's useful for determining keys in database schema normalization.
Tips
A common mistake is not applying all functional dependencies exhaustively. Ensure to revisit dependencies in the set and see if there are new derivations from each iteration.
Sources
- Functional Dependency and Attribute Closure - GeeksforGeeks - geeksforgeeks.org
- Closure of an Attribute - Javatpoint - javatpoint.com
- Given a relation with FDs, compute the closure of set of attributes - Stack Overflow - stackoverflow.com
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