Look at the 4 entities below and assume that customer_id is the key common to all tables. • Customer: An entity that describes a customer. An instance occurs for unique customers only using name, date of birth, and login name as customer_id primary key. • Online: An entity that describes a customer purchasing activity online. An instance occurs when the customer completes the transaction. Customers can purchase more than once. • Visits: An entity that describes a customer purchase in a physical store. An instance occurs if a customer makes or purchase or checks-in using an app. Customers can visit more than once per day. • Satisfaction: An entity that represents data from a recent customer satisfaction survey. An instance occurs when a customer takes the survey. A customer is tracked by login name and can only take the survey one time. Use the information to match the following relationships. Answers can be reused more than once. The relationship between Customer and Online The relationship between Customer and Satisfaction The relationship between Online and Visits The relationship between Visits and Satisfaction one-to-one one-to-many many-to-many prototype ◆ +

Look at the 4 entities below and assume that customer_id is the key common to all tables. • Customer: An entity that describes a customer. An instance occurs for unique customers only using name, date of birth, and login name as customer_id primary key. • Online: An entity that describes a customer purchasing activity online. An instance occurs when the customer completes the transaction. Customers can purchase more than once. • Visits: An entity that describes a customer purchase in a physical store. An instance occurs if a customer makes or purchase or checks-in using an app. Customers can visit more than once per day. • Satisfaction: An entity that represents data from a recent customer satisfaction survey. An instance occurs when a customer takes the survey. A customer is tracked by login name and can only take the survey one time. Use the information to match the following relationships. Answers can be reused more than once. The relationship between Customer and Online The relationship between Customer and Satisfaction The relationship between Online and Visits The relationship between Visits and Satisfaction one-to-one one-to-many many-to-many prototype ◆ +

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Q9
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