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Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

Using the INVOICE table structure shown in Table P6.3, do the following:
TABLE P6.3
a. Write the relational schema, draw its dependency diagram, and identify all
dependencies, including all partial and transitive dependencies. You can assume
that the table does not contain repeating groups and that an invoice number
references more than one product. (Hint: This table uses a composite primary
key.)
b. Remove all partial dependencies, write the relational schema, and draw the
new dependency diagrams. Identify the normal forms for each table structure
you created.
Note
You can assume that any given product is supplied by a single vendor, but a vendor
can supply many products. Therefore, it is proper to conclude that the following
dependency exists:
PROD_NUM → PROD_LABEL, PROD_PRICE, VEND_CODE, VEND_NAME
(Hint: Your actions should produce three dependency diagrams.)
c. Remove all transitive dependencies, write the relational schema, and draw the
new dependency diagrams. Also identify the normal forms for each table structure you created.
d. Draw the Crow’s Foot ERD.