Read the following cases and create ER diagrams using ERDplus. Draw each diagram on the same workspace and save it as HW1. 1) At a university, every professor teaches at least one course and can teach as many courses as they want per semester. Each course is taught by only one professor. A course is normally delivered on-ground in an assigned classroom, and a classroom can be used by many courses, or sometimes left unused in a semester. A building has many classrooms and a classroom must be in a building. 2) In a grocery store, customers shop, then pay and get a receipt. A purchase receipt can contain many products. A product can show up many times on a receipt. Each receipt is produced for one customer at a time. Customers can have many receipts (produced at different shopping times). 3) In a car maintenance shop, there are jobs (e.g. oil change, car wash, etc.). A customer can order one or more of these jobs. A job can be ordered by many customers. Jobs use supplies (e.g. oil, cleaner, etc.). A supply item can be used in many jobs and a job can use many supplies. 4) A company sells products, each of which has a productid, name and price. These products are sold to customers who have customerID, name, and ZIP code. Products are purchased through purchase transactions with a transactionID and transaction date. Multiple products can be purchased in a single purchase transaction while a customer can make multiple purchase transactions. When done, click on menu and save your diagram as a picture in your own computer. Then submit it back to Canvas.
Read the following cases and create ER diagrams using ERDplus. Draw each diagram on the same workspace and save it as HW1. 1) At a university, every professor teaches at least one course and can teach as many courses as they want per semester. Each course is taught by only one professor. A course is normally delivered on-ground in an assigned classroom, and a classroom can be used by many courses, or sometimes left unused in a semester. A building has many classrooms and a classroom must be in a building. 2) In a grocery store, customers shop, then pay and get a receipt. A purchase receipt can contain many products. A product can show up many times on a receipt. Each receipt is produced for one customer at a time. Customers can have many receipts (produced at different shopping times). 3) In a car maintenance shop, there are jobs (e.g. oil change, car wash, etc.). A customer can order one or more of these jobs. A job can be ordered by many customers. Jobs use supplies (e.g. oil, cleaner, etc.). A supply item can be used in many jobs and a job can use many supplies. 4) A company sells products, each of which has a productid, name and price. These products are sold to customers who have customerID, name, and ZIP code. Products are purchased through purchase transactions with a transactionID and transaction date. Multiple products can be purchased in a single purchase transaction while a customer can make multiple purchase transactions. When done, click on menu and save your diagram as a picture in your own computer. Then submit it back to Canvas.
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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