an invoice is written by one sales rep but a sales rep writes many invoices a vendor sells many products but a product is bought from one vendor an invoice has one or many products and a product is found on zero, one or many invoices ● Identify the entity ● Identify the entity’s attribute ● Identify the primary and foreign Keys ● Identify relationship between Entities ● Identify the Cardinality constraints ● Draw ERD
an invoice is written by one sales rep but a sales rep writes many invoices a vendor sells many products but a product is bought from one vendor an invoice has one or many products and a product is found on zero, one or many invoices ● Identify the entity ● Identify the entity’s attribute ● Identify the primary and foreign Keys ● Identify relationship between Entities ● Identify the Cardinality constraints ● Draw ERD
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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- an invoice is written by one sales rep but a sales rep writes many invoices
- a vendor sells many products but a product is bought from one vendor
- an invoice has one or many products and a product is found on zero, one or many invoices
|
● |
Identify the entity |
|
● |
Identify the entity’s attribute |
|
● |
Identify the primary and foreign Keys |
|
● |
Identify relationship between Entities |
|
● |
Identify the Cardinality constraints |
|
● |
Draw ERD |
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