Answered: Question: Draw ERD for the below…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question: Draw ERD for the below scenario.

Scenario:
The COVID-19, is the biggest pandemic for a number of reasons. It's a kind of virus, meaning no one has immunity, and there is no vaccine. Therefore, to prevent this virus a “C19Tracker” is proposed to be invented. Having the followingfeatures:

1. Live data: Shows the most recent data, and updatesautomatically.

2. Distribution map with two levels of details:

Countries: When the user zooms out. Fewer details and reduced clutter.

Cities: When the user zooms in. More details.

3. Charts: Current state chart for all countries (and cities).Timeline chart for all countries (and cities).Top affected countries chart with info about every country.

4. Search for countries & cities.

5. Today widget for worldwide stats.

6. Red color scale: Reflects the number of confirmed cases. In addition to increasing circle size.

7. ipad support.

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