PE6

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Rochester Institute of Technology *

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230

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Computer Science

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Apr 3, 2024

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4

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ISTE-230 Introduction to Database & Data Modeling Practice Exercise # 6 – Normalization through BCNF Name: _________Aedan Lahiff____________________________________ All assignments will be graded with regard to the standards that were discussed in class, which can be found in the Standards Content area. Problem #1 Given the original relation (PUPPY) and functional dependencies, normalize the original and all resulting relations to BCNF. Be sure to use proper relational notation: RELATION(pkattr , attribute, fkattr ). Include reference statements for foreign keys. PUPPY(puppyID , puppyName, kennelNumber, kennelLocation) Functional Dependencies: puppyID è puppyName, kennelNumber, kennelLocation kennelNumber è kennelLocation YOUR ANSWER (Final set of relations normalized to BCNF): PUPPY(puppyID , puppyName, kennelNumber ) KENNEL(kennelNumber , kennelLocation) ISTE-230 – Introduction to Database and Data Modeling Page 1 of 4 ©Elissa Weeden, David Patric 2020
Problem #2 Given the original relation (VEHICLE) and functional dependencies, normalize the original and all resulting relations to BCNF. Be sure to use proper relational notation: RELATION(pkattr , attribute, fkattr ). Include reference statements for foreign keys. VEHICLE vin make model year ownerID owner 111abc Toyota Corrolla 1988 111223333 Joe Smith 223ahv Ford Windstar 1998 222334444 Bill Gates 332amz GM GMC 1995 333445555 Tom Green 876grd Subara u Outback 2000 987654321 Bob Jones VEHICLE(vin , make, model, year, ownerID, owner) Functional Dependencies: vin è make, model, year, ownerID, owner ownerID è owner YOUR ANSWER (Final set of relations normalized to BCNF): VEHICLE(vin , make, model, year, ownerID ) OWNER(ownerID , owner) ISTE-230 – Introduction to Database and Data Modeling Page 2 of 4 ©Elissa Weeden, David Patric 2020
Problem #3 A violation of 1NF is repeating groups – more than one attribute from same physical and logical domain (ex. author1, author2, etc.) Some examples we have worked with hid or omitted this as a “fix” for multi-valued attributes. In PE#2 there should have been the following: UoD: PE2 Book Tracking System Resulting Relation: BOOK(title, isbn13Number , author1, author2, author3, author4, author5, numberOfPages, releaseDate) Functional Dependencies: isbn13Number è title, author1, author2, author3, author4, author5, numberOfPages, releaseDate Finish the solution that what was started below in an effort to solve the repeating group problem. Include the modified BOOK relation that would result from the addition of the BOOK_AUTHOR relation. Use proper relational notation and include reference statements for any foreign keys. Unfinished Solution: BOOK(isbn13Number , title, releaseDate, numberOfPages) BOOK_AUTHOR(isbn13Number, author) YOUR COMPLETED SOLUTION: BOOK(isbn13Number , title, releaseDate, numberOfPages) BOOK_AUTHOR( isbn13Number , author ) ISTE-230 – Introduction to Database and Data Modeling Page 3 of 4 ©Elissa Weeden, David Patric 2020
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Problem #4 For the relation below, determine the highest normal form the relation is in, the reason, and if necessary normalize through BCNF. Relation: Q2( a, b , c, d ) Functional Dependencies: a, b c, d c, d a, b YOUR ANSWER: The highest normal form Q2 is in is BCNF. Nothing needs to be normalized as it is already in BCNF. Problem #5 Given the original relation (A) and functional dependencies, normalize the original and all resulting relations to BCNF. Be sure to use proper relational notation: RELATION(pkattr , attribute, fkattr ). Include reference statements for foreign keys. A(1, 2, 3 , 4, 5, 6, 7, 8, 9) Functional Dependencies: 1, 2, 3 4, 5, 6, 7, 8, 9 (based on PK choice for a) 1 4 4 1 2 6, 7, 8, 9 6,7 8,9 YOUR ANSWER (Final set of relations normalized to BCNF): A1(1, 2, 3 , 5) B(1 , 4) C(2, 6, 7) D(6, 7 , 8,9) ISTE-230 – Introduction to Database and Data Modeling Page 4 of 4 ©Elissa Weeden, David Patric 2020

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