Answered: Review: Entity-Relationship (ER)…

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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Transcribed Image Text:**Review: Entity–Relationship (ER)** **Entity-Relationship (ER) Diagram for a Customer Order Database** **Diagram Explanation:** - **Salesperson**: Connected with a "crow-feet symbol" indicating a one-to-many relationship, meaning one salesperson can have many customers. - **Customer**: Connected to "Salesperson" and "Orders". It serves as a bridge between salespeople and orders. - **Orders**: Placed by customers and includes "Line items." - **Line items**: Specifies the products on the order and forms a many-to-many relationship with "Product." - **Product**: Detailed in "Line items." - **Invoice**: Generated from the orders, forming a one-to-one relationship. *Development of ER diagrams ensures that the logical structure of application programs is consistent with the data relationships in the database.* --- **Instructions:** Draw one integrated ER diagram to show relationships among the tables described: 1. Each ‘student-profile’ has many ‘student-financials.’ 2. Each ‘student-profile’ can take many ‘student-courses.’ 3. Each ‘student-courses’ can have one ‘student-grades.’ 4. Each ‘Student-account’ has one ‘student-transcript.’ *Please draw an ER diagram to show the relationship among the tables as described above.*

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