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ERD Logical Data Model: ONLINE ORDER SYSTEM
Information Engineering Notation
Credit Card
Number (PK)
Bank Expiration Date
Customer
Customer Name(PK)
Referring Affiliate (FK)
Affiliate
Affiliate ID (PK)
Item
Item Number (PK)
Description Price
Order
Order Number (PK)
CyberCash
Transaction ID (PK)
Shipping
Invoice Number (PK)
ERD Information Engineering Notation
Zero or One
One Only
Zero or more
One or more
