5 Consider a relation Stocks(B, O, I, S, Q, D), whose attributes may be thought of informally as broker, office (of the broker), investor, stock, quantity(of the stock owned by the investor), and dividend(of the stock). Let the set of FD's for stocks be S-D, IB, IS →Q, B0. Do the following 5.1 What are all the keys for Stocks ? 5.2 Verify that the given FD's are their own minimal basis. 44734 5.3 Use the 3NF synthesis algorithm to find a lossless-join, dependency-preserving decomposition of R into 3NF X3M202 relations. Are any of the relations not in BCNF ? X23 M2 447341 XM2020
5 Consider a relation Stocks(B, O, I, S, Q, D), whose attributes may be thought of informally as broker, office (of the broker), investor, stock, quantity(of the stock owned by the investor), and dividend(of the stock). Let the set of FD's for stocks be S-D, IB, IS →Q, B0. Do the following 5.1 What are all the keys for Stocks ? 5.2 Verify that the given FD's are their own minimal basis. 44734 5.3 Use the 3NF synthesis algorithm to find a lossless-join, dependency-preserving decomposition of R into 3NF X3M202 relations. Are any of the relations not in BCNF ? X23 M2 447341 XM2020
Essentials Of Investments
11th Edition
ISBN:9781260013924
Author:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
Publisher:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
Chapter1: Investments: Background And Issues
Section: Chapter Questions
Problem 1PS
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Transcribed Image Text:5 Consider a relation Stocks(B, O, I, S, Q, D), whose attributes
may be thought of informally as broker, office (of the broker),
investor, stock, quantity(of the stock owned by the investor),
and dividend(of the stock). Let the set of FD's for stocks be
S-D, I
1-B, IS Q, B→0. Do the following
له
5.1 What are all the keys for
Stocks ?
5.2 Verify that the given FD's are
their own minimal basis.
5.3 Use the 3NF synthesis
algorithm to find a lossless-join,
dependency-preserving
decomposition of R into 3NF
M202 relations. Are any of the relations
447 not in BCNF ?
艾多
X 3 M
1473418
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