1. Assume a relational schemas R(A,B,C,D,E)FDs set of it is F={ABBCCDE, E->A} : Give the results of...
Question:
1. Assume a relational schemas R(A,B,C,D,E),FDs set of it is F={AB,BC,CDE, E->A} :
Give the results of A + ,ED +
find the candidate keyword of R and write a simple process;
determine which Norm Form R belongs to and explain the reason.
2. Consider the universal relation R = {A, B, C, D, E, F, G, H, I, J} and the set of functional dependencies F = { {A, B}→{C}, {A}→{D, E}, {B}→{F}, {F}→{G,H}, {D}→{I, J} }. What is the key for R? Decompose R into 2NF and then 3NF relations.
3. Consider the following relation for published books:
BOOK (Book_title , Author_name , Book_type , List_price , Author_affil ,
Publisher )
Author_affil refers to the affiliation of author. Suppose the following dependencies exist:
Book_title → Publisher , Book_type
Book_type → List_price
Author_name → Author_affil
a. What normal form is the relation in? Explain your answer.
b. Apply normalization until you cannot decompose the relations further.State the reasons
behind each decomposition.
The Legal Environment of Business A Critical Thinking Approach
ISBN: 978-0132664844
6th Edition
Authors: Nancy K Kubasek, Bartley A Brennan, M Neil Browne