Figure 2-28 shows two diagrams (A and B), both of which are legitimate ways to represent that
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Figure 2-28 shows two diagrams (A and B), both of which are legitimate ways to represent that a stock has a history of many prices. Which of the two diagrams do you consider a better way to model this situation and why?
Transcribed Image Text:
A STOCK Stock ID {Price History (Price, Effective Date)} STOCK Stock ID STOCK PRICE Effective Date Price
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The crux of the answer relies upon what the purpose of the ER diagram is for the modeling situation ...View the full answer
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Related Book For
Modern Database Management
ISBN: 978-0133544619
12th edition
Authors: Jeff Hoffer, Ramesh Venkataraman, Heikki Topi
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