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SQL Database question is below. if you are solve ı'm very appreciate that.

SQL Database question is below. if you are solve ı'm very appreciate that.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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SQL Database question is below. if you are solve ı'm very appreciate that.

1. You are given the task of designing a DBMS-based email system. The system will be used to store and access email messages and contact lists for a large collection of users. Your client has specified the following requirements: • Each user will have a unique numeric ID. In addition, you need to store the first name, last name, and email address of each user in the system. • Each user has a number of contacts. A contact has a first name, a last name, an email address, and one or more phone numbers (where each phone number has a type, e.g., home, cell, etc.). • An email message belongs to exactly one user and has a "to" field, a date, a subject field, and a body field. • Each email message is stored in exactly one folder. • A folder corresponds to a single user and has a name and a parent folder. Every user is either a paying customer or a trial user. • Trial users have expiration dates and remaining quota associated with them. Paying customers have no quota but do have a balance associated with them. Draw an ER diagram for this database using as much of the ER model as appropriate.
Transcribed Image Text:1. You are given the task of designing a DBMS-based email system. The system will be used to store and access email messages and contact lists for a large collection of users. Your client has specified the following requirements: • Each user will have a unique numeric ID. In addition, you need to store the first name, last name, and email address of each user in the system. • Each user has a number of contacts. A contact has a first name, a last name, an email address, and one or more phone numbers (where each phone number has a type, e.g., home, cell, etc.). • An email message belongs to exactly one user and has a "to" field, a date, a subject field, and a body field. • Each email message is stored in exactly one folder. • A folder corresponds to a single user and has a name and a parent folder. Every user is either a paying customer or a trial user. • Trial users have expiration dates and remaining quota associated with them. Paying customers have no quota but do have a balance associated with them. Draw an ER diagram for this database using as much of the ER model as appropriate.
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