a representation of the data in terms of entities , attributes and relationships between entities . Construct an E - R diagram to depict this representation . Show the cardinalities and all necessary information . Draw the solution on a piece of paper . Add your name and Upload you file here . You are asked to design a database for a sales company which needs to keep track of its sales orders in addition to employees ' information . 1- The company has salespersons . For each Salesperson , we need to know his ssn , name , date of start at work , address and phone number.2- A sales person plays the role of an agent for customers.3- A customer has only one agent , but the same salesperson can be an agent for several customers . Customers are identified by their emails . The company also stores a customers ' name , address , phone number and birthdate . 4- Customers place orders . Each customer can place many orders . 5- Orders are identified by their serial number , issuance date and total amount.6- An order can contain multiple inventory items . Each item has a serial number , name , type and quantity available . When issuing an order , we need to know the requested amount of each item .
a representation of the data in terms of entities , attributes and relationships between entities . Construct an E - R diagram to depict this representation . Show the cardinalities and all necessary information . Draw the solution on a piece of paper . Add your name and Upload you file here . You are asked to design a database for a sales company which needs to keep track of its sales orders in addition to employees ' information . 1- The company has salespersons . For each Salesperson , we need to know his ssn , name , date of start at work , address and phone number.2- A sales person plays the role of an agent for customers.3- A customer has only one agent , but the same salesperson can be an agent for several customers . Customers are identified by their emails . The company also stores a customers ' name , address , phone number and birthdate . 4- Customers place orders . Each customer can place many orders . 5- Orders are identified by their serial number , issuance date and total amount.6- An order can contain multiple inventory items . Each item has a serial number , name , type and quantity available . When issuing an order , we need to know the requested amount of each item .
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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Design a representation of the data in terms of entities , attributes and relationships between entities . Construct an E - R diagram to depict this representation . Show the cardinalities and all necessary information . Draw the solution on a piece of paper . Add your name and Upload you file here . You are asked to design a database for a sales company which needs to keep track of its sales orders in addition to employees ' information . 1- The company has salespersons . For each Salesperson , we need to know his ssn , name , date of start at work , address and phone number.2- A sales person plays the role of an agent for customers.3- A customer has only one agent , but the same salesperson can be an agent for several customers . Customers are identified by their emails . The company also stores a customers ' name , address , phone number and birthdate . 4- Customers place orders . Each customer can place many orders . 5- Orders are identified by their serial number , issuance date and total amount.6- An order can contain multiple inventory items . Each item has a serial number , name , type and quantity available . When issuing an order , we need to know the requested amount of each item .
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