Create a set of Tables in 3NF. Underline the Primary Key(s) for each table. Considering labeling foreign keys (fk) to aid in your design.
Create a set of Tables in 3NF. Underline the Primary Key(s) for each table. Considering labeling foreign keys (fk) to aid in your design.
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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Transcribed Image Text:**Designing Relational Database Tables in Third Normal Form (3NF)**
When creating a database schema, it is crucial to organize tables efficiently to ensure data integrity and reduce redundancy. Below is an example of how to design tables for a real estate agent listing database in Third Normal Form (3NF). This design involves two primary tables: the Listing Table and the Agent Table. Primary keys are underlined to highlight their unique identifying role, and considerations for foreign key labeling are suggested.
---
**Real Estate Agent Listings:**
**Listing Table:**
- **_Listing ID_** (Primary Key)
- Address
- City
- Number of stories
- Frame type
- Basement? (Indicates presence or absence)
- Heating type
- Taxes
- School district
- Number of bedrooms
- Room Info (repeated 1-n times)
- Width
- Length
- Flooring Type
- Agent Info (repeated 1-n times)
- _Agent ID_ (Foreign Key)
**Agent Table:**
- Agent Name
- **_Agent ID_** (Primary Key)
- Address
- City
- Phone
- Listing Info (repeated 1-n times)
- _Listing ID_ (Foreign Key)
---
In this schema:
- The **Listing Table** stores details about individual property listings. Each listing is uniquely identified by the **Listing ID**, and associated information like the number of bedrooms, address, and physical attributes of the property is included. _Agent ID_ serves as a foreign key to link agents managing the listings.
- The **Agent Table** includes data about real estate agents, identified uniquely by **Agent ID**. This table also features contact details and the _Listing ID_ that connects each agent with their associated property listings.
By adhering to 3NF, the database design minimizes duplicate data and potential anomalies during data operations, enhancing performance and consistency.

Transcribed Image Text:**Invoice Details**
**Company Information:**
- *Your Company Name*
Street Address
City, ST ZIP Code
Phone Number, Web Address, etc.
---
**Invoice Information:**
- **INVOICE**
- **Date:** November 17, 2006
- **Invoice #:** INV1000
---
**Billing and Shipping Information:**
- **Bill To:**
C1007
ABC Company
123 Big Forest Valley
Ottawa, ON Z12345
Canada
- **Ship To:**
SH Name 1
SH Address 1
SH CityState 1 SHZ12345
USA
---
**Order Information:**
- **P.O. #:** O200612005
- **Sales Rep. Name:** Sales1
- **Ship Date:** 11/17/2006
- **Ship Via:** UPS
- **Terms:** Net 7
- **Due Date:**
---
**Product Details:**
| Product ID | Description | Quantity | Unit Price | Line Total |
|------------|-------------------------|----------|------------|-------------|
| P1003 | Motorola E815 | 10 | 420.00 | 4,200.00 |
| P1000 | Nokia 3220 | 12 | 199.99 | 2,399.88 |
| P1004 | Non-taxable item | 5 | 200.00 | 1,000.00 |
| P1002 | It is a service | 3.2 | 255.52 | 817.66 |
| P1006 | Motorola V3 Razr Black | 10 | 500.00 | 5,000.00 |
---
**Financial Summary:**
- **Subtotal:** 13,417.54
- **PST (6.50%):** 807.14
- **GST (3.20%):** 397.36
- **Shipping & Handling:** -
**Total:** 14,622.04
**Paid:** -
**Total Due:** 14,622.04
---
**Notes:**
(blank)
---
**Footer:**
*THANK YOU FOR YOUR BUSINESS!*
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