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ORIGINAL ANSWERS ONLY!!!! COPIED ANSWERS WILL BE DOWNVOTED!   Using the following table, create a 3NF relational schema. No diagram necisary, just "ENTITY(PRIMARY KEY, FOREIGN KEY, ATTRIBUTES)" format   Please explain your steps as well, I'd like to see how you got there

ORIGINAL ANSWERS ONLY!!!! COPIED ANSWERS WILL BE DOWNVOTED!   Using the following table, create a 3NF relational schema. No diagram necisary, just "ENTITY(PRIMARY KEY, FOREIGN KEY, ATTRIBUTES)" format   Please explain your steps as well, I'd like to see how you got there

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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ORIGINAL ANSWERS ONLY!!!! COPIED ANSWERS WILL BE DOWNVOTED!

 

Using the following table, create a 3NF relational schema. No diagram necisary, just "ENTITY(PRIMARY KEY, FOREIGN KEY, ATTRIBUTES)" format

 

Please explain your steps as well, I'd like to see how you got there

 

 

**Database Normalization: Understanding Functional and Transitive Dependencies** This educational resource explains the concepts of First Normal Form (1NF) and the importance of dependencies in relational database design. ### Diagram Explanation: **Table Name: INVOICE** - **Attributes:** - **INVOICE_NUM** (Primary Key) - **CUST_ID** - **CUST_CNAME** - **CUST_STREET** - **CUST_CITY** - **CUST_STATE** - **CUST_ZIP** - **INVOICE_DATE** - **TAX_RATE** - **Dependencies:** - **Functional Dependencies**: Each attribute is dependent on the primary key `INVOICE_NUM`. This ensures uniqueness and consistency for every invoice entry. - **Transitive Dependencies**: Attributes like `CUST_CNAME`, `CUST_STREET`, `CUST_CITY`, `CUST_STATE`, and `CUST_ZIP` are transitively dependent on `CUST_ID` because they are customer's details. The diagram uses red arrows to indicate these dependencies, highlighting the relationship between `INVOICE_NUM`, `CUST_ID`, and other customer-related fields. **Table Name: INVOICE_PART_INFO** - **Attributes:** - **INVOICE_NUM** (Composite Primary Key Part) - **PART_NUM** (Composite Primary Key Part) - **PART_DESC** - **PART_QUANTITY** - **PART_PRICE** - **Dependencies:** - **Partial Dependency**: Here, `PART_DESC` and `PART_PRICE` are dependent on `PART_NUM`. The diagram indicates this dependency with an arrow, showing that each part description and price is unique to its part number. This educational example demonstrates how normalization helps organize a database efficiently by eliminating redundancy and ensuring data integrity through appropriate dependency management.
Transcribed Image Text:**Database Normalization: Understanding Functional and Transitive Dependencies** This educational resource explains the concepts of First Normal Form (1NF) and the importance of dependencies in relational database design. ### Diagram Explanation: **Table Name: INVOICE** - **Attributes:** - **INVOICE_NUM** (Primary Key) - **CUST_ID** - **CUST_CNAME** - **CUST_STREET** - **CUST_CITY** - **CUST_STATE** - **CUST_ZIP** - **INVOICE_DATE** - **TAX_RATE** - **Dependencies:** - **Functional Dependencies**: Each attribute is dependent on the primary key `INVOICE_NUM`. This ensures uniqueness and consistency for every invoice entry. - **Transitive Dependencies**: Attributes like `CUST_CNAME`, `CUST_STREET`, `CUST_CITY`, `CUST_STATE`, and `CUST_ZIP` are transitively dependent on `CUST_ID` because they are customer's details. The diagram uses red arrows to indicate these dependencies, highlighting the relationship between `INVOICE_NUM`, `CUST_ID`, and other customer-related fields. **Table Name: INVOICE_PART_INFO** - **Attributes:** - **INVOICE_NUM** (Composite Primary Key Part) - **PART_NUM** (Composite Primary Key Part) - **PART_DESC** - **PART_QUANTITY** - **PART_PRICE** - **Dependencies:** - **Partial Dependency**: Here, `PART_DESC` and `PART_PRICE` are dependent on `PART_NUM`. The diagram indicates this dependency with an arrow, showing that each part description and price is unique to its part number. This educational example demonstrates how normalization helps organize a database efficiently by eliminating redundancy and ensuring data integrity through appropriate dependency management.
Expert Solution
Step 1

A) 

Invoice

The transitive functional dependency are

CustID -> CustName, CustStreet, CustCity, CustState, CustZip, Tax rate

CustCity, CustState, CustZip -> Tax rate

These are transitive functional dependency violating 3NF.

To form 3NF schema, take closure of this dependency and form a new relation. 

 

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