Tutorial1

Tutorial1 - CS411 Tutorial 1 1 Problem 1: ER Diagram You...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CS411 Tutorial 1 1 Problem 1: ER Diagram You have been hired to develop an account management system for a company. The company sells packages that allow consumers to download books in either text or audio format. Draw the database ER diagram with the following information: A package allows the consumer to download a given number of books or audiobooks a month, depending on the package type. Each package has a unique id . Each package also must have a type , noting what kind of downloads it provides: either books or audiobooks but not both. Each package also must have a tier , representing the number of monthly downloads allowed by this package (e.g. “Tier10” means 10 monthly downloads are allowed, "Tier50" means 50 monthly downloads are allowed, etc.) Each account has a unique id . Each account has one or more packages . Each account is associated with one or more credit cards Each credit card is associated with exactly one account . Each
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

Tutorial1 - CS411 Tutorial 1 1 Problem 1: ER Diagram You...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online