Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

Suppose you are given the following business rules to form the basis for a database design. The database must enable the manager of a company

Suppose you are given the following business rules to form the basis for a database design. The database must enable the manager of a company dinner club to mail invitations to the club's members, to plan the meals, to keep track of who attends the dinners, and so on.

  • Each dinner serves many members, and each member may attend many dinners.
  • A member receives many invitations, and each invitation is mailed to many members.
  • A dinner is based on a single entree, but an entree may be used as the basis for many dinners. For example, a dinner may be composed of a fish entree, rice, and corn. Or the dinner may be composed of a fish entree, a baked potato, and string beans.

Because the manager is not a database expert, the first attempt at creating the database uses the structure shown in the table below:

Attribute Name Sample Value Sample Value Sample Value
MEMBER_NUM 214 235 214
MEMBER_NAME Alice B. VanderVoort Gerald M. Gallega Alice B. VanderVoort
MEMBER_ADDRESS 325 Meadow Park 123 Rose Court 325 Meadow Park
MEMBER_CITY Murkywater Highlight Murkywater
MEMBER_ZIPCODE 12345 12349 12345
INVITE_NUM 8 9 10
INVITE_DATE 23-Feb-2016 12-Mar-2016 23-Feb-2016
ACCEPT_DATE 27-Feb-2016 15-Mar-2016 27-Feb-2016
DINNER_DATE 15-Mar-2016 17-Mar-2016 15-Mar-2016
DINNER_ATTENDED Yes Yes No
DINNER_CODE DI5 DI5 DI2
DINNER_DESCRIPTION Glowing sea delight Glowing sea delight Ranch Superb
ENTREE_CODE EN3 EN3 EN5
ENTREE_DESCRIPTION Stuffed crab Stuffed crab Marinated steak
DESERT_CODE DE8 DE5 DE2
DESERT_DESCRIPTION

Chocolate mousse

with raspberry sauce

Cherries jubilee

Apple pie with honey

crust

Given the information in the table above:

  1. Given the table structure illustrated above, write its relational schema and draw its dependency diagram. Label all transitive and/or partial dependencies. (Note: For this example, you can use the table name and attribute names as given even though they don't strictly follow the relational schema naming conventions given in the notes. You can also draw a shortened version of these attribute names if it is easier to work with).
  2. Break up the dependency diagram you drew in part (a) to produce dependency diagrams that are in 3NF and write the relational schema. (Hint: You might have to draw a few new attributes. Also, make sure that the new dependency diagrams contain attributes that meet proper design criteria; that is, make sure that there are no multivalued attributes, and so on.)
  3. Draw the Crow's Foot ERD to reflect the dependency diagrams you drew in Part (b).

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Hospitality Finance And Accounting Essential Theory And Practice

Authors: Rob Van Ginneken

1st Edition

0429015119, 9780429015113

More Books

Students also viewed these General Management questions

Question

Students graphed their completion of homework on a class report.

Answered: 1 week ago