ER Modeling Assignment    Question 1. A company is organized into departments. Each department has a unique name, a unique number, and a particular employee who manages the department. We keep track of the start date when that employee began managing the department. A department may have several locations. A department controls a number of projects, each of which has a unique name, a unique number, and a single location. We store each employee's name, social security number.i address, salary, sex, and birth date. An employee is assigned to one department but may work on several projects, which are not necessarily controlled by the same department. We keep track of the number of hours per week that an employee works on each project. We also keep track of the direct supervisor of each employee. We want to keep track of the dependents of each employee for insurance purposes. We keep each dependent's first name, sex, birth date, and relationship to the employee. Question 2 A company has a number of employees. The attributes of Employee include employee-Id (unique identifier), Name, Address, and birthdates. The company also has several projects. Attributes of project include project_Id (unique identifier), project_Name, and start_Date. Each employee may be assigned to zero or more projects. A project must have at least one employee assigned, and may have any number of employees assigned. An employee’s billing rate may vary by project, and the company wishes to record the applicable billing rate for each employee when assigned to a particular project.

C++ for Engineers and Scientists
4th Edition
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Bronson, Gary J.
Chapter11: Introduction To Classes
Section11.5: A Closer Look: Uml Class And Object Diagrams
Problem 8E
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ER Modeling Assignment 

 

Question 1.

A company is organized into departments. Each department has a unique name, a unique number, and a particular employee who manages the department. We keep track of the start date when that employee began managing the department. A department may have several locations.

A department controls a number of projects, each of which has a unique name, a unique number, and a single location.

We store each employee's name, social security number.i address, salary, sex, and birth date. An employee is assigned to one department but may work on several projects, which are not necessarily controlled by the same department. We keep track of the number of hours per week that an employee works on each project. We also keep track of the direct supervisor of each employee.

We want to keep track of the dependents of each employee for insurance purposes. We keep each dependent's first name, sex, birth date, and relationship to the employee.

Question 2

A company has a number of employees. The attributes of Employee include employee-Id (unique identifier), Name, Address, and birthdates. The company also has several projects. Attributes of project include project_Id (unique identifier), project_Name, and start_Date. Each employee may be assigned to zero or more projects. A project must have at least one employee assigned, and may have any number of employees assigned. An employee’s billing rate may vary by project, and the company wishes to record the applicable billing rate for each employee when assigned to a particular project.

 

Question 3

A database is to be designed for a college to monitor students’ progress throughout their course of study. The students are pursuing a degree (such as BA, BA (Hons) MSc, etc.) within the framework of a modular system. The college provides a number of modules, each being characterized by a code, title, and a credit value. A module belongs to one department and is co-ordinated by a module leader who shares teaching duties with one or more lecturers. A lecturer may teach (and be a module leader for) more than one module. Information about a lecturer include his/her IDNO, Name which is comprised of a surname and first name, Address {StrNo, Zip Code, City} and they are required to have at least two phone numbers. Every lecturer belongs to a given department, and a department hosts at least two modules. Each department has a code, name. Student are free to choose any module they wish but can’t do more than five and less than three and; a module can only be taught if it has more than ten students. Information about students includes their numbers, names, address, degree they are pursuing. Their past performance i.e. examination grade for each module taken is recorded. 

 

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ISBN:
9781133187844
Author:
Bronson, Gary J.
Publisher:
Course Technology Ptr