Normal Forms

timer Asked: Apr 23rd, 2013
account_balance_wallet $20

Question Description

The relation Viewing is intended to record information for a house agent about the details of properties on his books and a history of their viewings together with the outcome of a viewing (whether the customer was definitely interested in buying the property, definitely not interested or still thinking about it). The

following gives the relational heading:

Viewing (PropertyCode, CustomerCode, DateOfViewing, Address, CouncilTaxBand, CouncilTax, CustomerName, CustomerContactNumber, OutcomeOfViewing)

The following gives some sample data from the corresponding relational table:


The first row in this table gives the information that property P1, 1 Cherry Gardens, Notlaw, ZZ1 3YY, being in council tax band B and so paying £1500 per year, was viewed on 24 December 2012 by customer C1, John Smith, with contact number 0799 9999999, who is not interested in buying it.

The following are some of the non-trivial functional dependencies on Viewings


 (a) Demonstrate that Viewing is subject to insertion, deletion and amendment anomalies.

 (b) From FD1–FD6, derive two moren on-trivial functional dependencies where the determinant is irreducible and part of the primary key. Justify your derivations.

 (c) Justify the statement that Viewing is not in second normal form (2NF). Write down the headings of relations in 2NF that will result from a non-lossy decomposition of Viewing.

Justify that these relations are in  2NF.

(d) Are each of the relations resulting from the decomposition in part (c) in third normal form (3NF)? Justify your answer.

For each relation which is not in 3NF, write down the headings of the

relations in 3NF which result from a non-lossy decomposition of that relation. Justify your answers.

Tutor Answer

School: UCLA

flag Report DMCA

Tutor went the extra mile to help me with this essay. Citations were a bit shaky but I appreciated how well he handled APA styles and how ok he was to change them even though I didnt specify. Got a B+ which is believable and acceptable.

Similar Questions
Hot Questions
Related Tags
Study Guides

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors