QI. Comsider relation RARCDE The following fnctional dependencien are amed to hold over R ARC (What is a key of R? ere aehiple candidate keys list all

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Q1. Consider relation R(AB.CD.E). The following functional dependencies are
assumed to hold over R:
AB,C
B>D
a) (What is a key of R? If there are multiple candidate keys list all.
b) List 3 functional dependencies, other than the ones given that are guaranteed to hold
on R based on 3 different inference rules. List the inference rule you are using.
e) Decompose into 3NF.
d) Do we know if the relation is in 4NF? Explain.
Transcribed Image Text:Q1. Consider relation R(AB.CD.E). The following functional dependencies are assumed to hold over R: AB,C B>D a) (What is a key of R? If there are multiple candidate keys list all. b) List 3 functional dependencies, other than the ones given that are guaranteed to hold on R based on 3 different inference rules. List the inference rule you are using. e) Decompose into 3NF. d) Do we know if the relation is in 4NF? Explain.
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