Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

Topics: Data Modeling: Project: 1. Draw an entity-relationship diagram that describes the following business environment. The city of Chicago, IL, wants to maintain information about

Topics: Data Modeling: Project: 1. Draw an entity-relationship diagram that describes the following business environment. The city of Chicago, IL, wants to maintain information about its extensive system of high schools, including its teachers and their university degrees, its students, administrators, and the subjects that it teaches. Each school has a unique name, plus an address, telephone number, year built, and size in square feet. Students have a student number, name, home address, home telephone number, current grade, and age. Regarding a students school assignment, the school system is only interested in keeping track of which school a student currently attends. Each school has several administrators, such as the principal and assistant principals. Administrators are identified by an employee number and also have a name, telephone number, and office number. Teachers are also identified by an employee number and each has a name, age, subject specialty such as English (assume only one per teacher), and the year that they entered the school system. Teachers tend to periodically move from school to school and the school system wants to keep track of the history of which schools the teacher has taught in, including the current school. Included will be the year in which the teacher entered the school and the highest pay rate that the teacher attained at the school. The school system wants to keep track of the universities that each teacher attended, including the degrees earned and the years in which they were earned. The school system wants to record each universitys name, address, year founded, and Internet URL (address.) Some teachers, as department heads, supervise other teachers. The school system wants to keep track of these supervisory relationships but only for teachers current supervisors. The school system also wants to keep track of the subjects that it offers (e.g. French I, Algebra III, etc.). Each subject has a unique subject number, a subject name, the grade level in which it is normally taught, and the year in which it was introduced in the school system. The school system wants to keep track of which teacher taught which student which subject, including the year this happened and the grade received. 2. What is the difference between a unary relationship, a binary relationship, and a ternary relationship?

Due by 10 pm

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Introduction To Data Mining

Authors: Pang Ning Tan, Michael Steinbach, Vipin Kumar

1st Edition

321321367, 978-0321321367

More Books

Students also viewed these Databases questions

Question

5 Name at least three recruitment methods.

Answered: 1 week ago

Question

Define marketing.

Answered: 1 week ago

Question

What are the traditional marketing concepts? Explain.

Answered: 1 week ago

Question

Define Conventional Marketing.

Answered: 1 week ago

Question

Define Synchro Marketing.

Answered: 1 week ago