Question: Given the set of functional dependencies F {fd1, fd2, fd3, fd4, fd5, fd6, fd7, fd8, fd9, fd10} introduced originally in Chapter 7, Exercise 14: fd1:

Given the set of functional dependencies F {fd1, fd2, fd3, fd4, fd5, fd6, fd7, fd8, fd9, fd10} introduced originally in Chapter 7, Exercise 14:
fd1: Tenant#  {Name, Job, Phone#, Address} fd2: Job  Salary

Given the set of functional dependencies F {fd1, fd2, fd3,

a. Using the universal relation schema (URS) and its associated primary key developed in Chapter 7, Exercise 14, indicate the immediate normal form violated in each of the functional dependencies given above and explain how the particular normal form is violated in each case.
b. If the URS is not in BCNF, design a relational schema that:
€¢ is in BCNF so that all anomalies due to functional dependencies are eradicated, and
€¢ yields all lossless-join decompositions
c. List the functional dependencies in F that are not preserved in this design.
d. Show the final design. The design should be parsimonious (i.e., minimal set in BCNF). Also, clearly indicate entity integrity and referential integrity constraints.
e. Revise the above design so that all dependencies are preserved in a lossless-join decomposition with the least sacrifice in the achieved level of normal form.
f. Reverse engineer the design to the conceptual level and show it as a Presentation Layer ER diagram.

fd3: Name Gender fas: Name. Phone#} (Tenant, Deposit) fd7: Area {Rent. County} fd9: {Lot. County} {Survey#. Area) fd4: Phone# Address fd6: County Tax rate fd8: Survey#-) Lot | fd10: {Surveys, Area) -) County

Step by Step Solution

3.40 Rating (156 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock

a FD NF violation b C The primary key of URS F is Tenant Lot County see Chapter 7 14d fdl fd2 fd3 fd... View full answer

blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Document Format (1 attachment)

Word file Icon

887-CS-DB (2196).docx

120 KBs Word File

Students Have Also Explored These Related Databases Questions!