“Snooty Fashions” is an exclusive fashion designer business. Snooty Fashions collaborates with several fashion designers to design outfits. For every fashion designer, a unique ID, name, city of residence and his/her major style are recorded. Snooty Fashions also maintains information of tailoring technicians that work on their outfits. For each tailoring technician, a unique ID, name and year of experience is recorded. Snooty Fashions work with many designers and tailoring technician, some of which are freelance professionals. Snooty Fashions however, also hires some of designers and tailoring technicians as employees with unique staff ID. Snooty Fashions sponsors its employees to join up to five fashion associations. The database needs to store information of Fashion Associations. The date when the employees join the associations need to be stored as well.

Which of the following EER diagrams is the best representation of the above problem statement?

b)“Funky Bizz” is a rental business that rents musical instruments to bands. The Funky Bizz Operations Database will keep track of instruments that the business owns. For each instrument, Funky Bizz will keep track of a unique instrument serial number as well as the instrument model and brand, the year when the instrument was made, and the age (measured in years) of the instrument. The customers of Funky Bizz are bands. For each band, Funky Bizz will keep track of the unique band name as well as the band’s address, contact person’s name, and a phone number. Funky Bizz also wants to store the real name, alias name and address of the band’s members. However, if the information of the band is no longer required for whatever reason, the information of the members must be removed for privacy purposes. Funky Bizz will record information about shows that its customer bands perform in. For each show, it will keep track of a unique show identifier composed of the show venue name and date. For each show, it will also keep track of show type and show size (in terms of the number of audience). A band may perform in many shows but does not have to perform in any. Each show must have at least one band performing, but many have many bands performing. For each band, Funky Bizz keeps track the order of their appearance in a show. This is to track the popularity of the band.

Which of the following EER diagrams is the best representation of the above problem statement?

3) A publisher publishes books in two formats, namely printed book and e-book, while for some other titles only printed book is available. If the book is printed, the information of the number of printed copies is required as well as printed copy price. For e-book, the information of the price is also maintained. In addition, for e-book, the publisher wants to keep track on the platforms in which the e-book can be viewed and downloaded. For each platform, information about platform name and description is required. For each book, the book ID, title, number of pages and release date are required. In addition, the genre of the book is also stored, in which each book can belong to more than one genre.

Which of the following ERE diagram is the best representation of the above problem statement? (Note: PK attributes are underlined).

4) A publisher publishes books in two formats, namely printed book and e-book, while for some other titles only printed book is available. If the book is printed, the information of the number of printed copies is required as well as printed copy price. For e-book, the information of the price is also maintained. In addition, for e-book, the publisher wants to keep track on the platforms in which the e-book can be viewed and downloaded. For each platform, information about platform name and description is required. For each book, the book ID, title, number of pages and release date are required. In addition, the genre of the book is also stored, in which each book can belong to more than one genre.

Which of the following ERE diagram is the best representation of the above problem statement? (Note: PK attributes are underlined).

4)  
 

(a) associa assocName date Join ASSOCIATIONS N (1,N) Sponsor in employelo N (0,5) EMPLOYEES designed designer Name cityBased tala10 tailorName yearExp DESIGNERS major influence TAILORS