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CIS515 Assignment 2: Database Systems and Database Models

The Strayer Oracle Server may be used to test and compile the SQL Queries developed for this assignment. Your instructor will provide you with login credentials to a Strayer University maintained Oracle server.

Imagine that you have been hired as a consultant to assist in streamlining the data processing of an international based organization that sells high-end electronics. The organization has various departments such as payroll, human resources, finance, marketing, sales, and operations. The sales department is the only department where employees are paid a commission in addition to their yearly salary and benefits. All other departments compensate their employees with a yearly salary and benefits only. Commission is paid by multiplying the employee’s commission rate by the total amount of product units sold. You have access to the following data sets:

Employee (EmpNumber, EmpFirstName, EmpLastName, CommissionRate, YrlySalary, DepartmentID, JobID)
Invoice (InvNumber, InvDate, EmpNumber, InvAmount)
InvoiceLine (InvLineNumber, InvNumber, ProductNumber, Quantity)
Product (ProductNumber, ProductDescription, ProductCost)
Department (DepartmentID, DepartmentDescription)
Job (JobID, JobDescription)

Write a two to three (2-3) page paper in which you:

Design a query that will allow the finance department to determine the commissions paid to specific employees of the sales department for the month of December. Note: You will need to generate the tables described above (Employee, Invoice, InvoiceLine, Product, Department, and Job) in order to compare and validate your code. Validated query code must be part of your paper.
Compare the code of the query you designed in Question one (1) to one that would show how much total compensation is paid to each employee for the same month.
Determine and explain the factors necessary to ensure referential integrity.
Create an object-oriented model to show how the tables are interrelated through the use of graphical tools such as Microsoft Visio, or an open source alternative such as Dia. Make sure that you are able to show the relationship types such as 1:M, 1:1, or M:1. Additionally, remember to include the determined factors from the previous assignment requirement. Note: The graphically depicted solution is not included in the required page length.
Identify which data components are the entities and attributes, and the relationship between each using an object representation diagram through the use of graphical tools such as Microsoft Visio, or an open source alternative such as Dia. Note: The graphically depicted solution is not included in the required page length.
Describe how Big Data could be used to assist in the productivity and forecasting of the organization’s products and resources.

GU CS371 Database Design Week 7 Assignment Chapter 8 Final Project

Fundamentals of Database Management Systems 2nd Edition
Questions and Task:
Question 1
In your own words discuss the benefits of normalization.

Question 2
Do you think we should normalize our designs to higher levels than 3NF? Why or why not?

Question 3
There are 14 physical database design techniques discussed in chapter 8. The goal of a quality physical design is to improve performance while disrupting the logical design as little as possible. Pick a technique, which you believe to be the most beneficial in accomplishing the above goal, and explain your reasoning.

Question 4
Discuss the concept of an index and explain how they improve performance. Assignment "Final Project Overview" You just took a job with a University and have been asked to track some information about the courses they offer. The previous employee was using a spreadsheet to track this information. The University is expanding from three classes to three hundred classes. Enrollment is expected to increase from around 20 students to 5,000. Your supervisors are not very tech savvy and they simply ask you to continue maintaining the spreadsheet. Review the spreadsheet labeled final_project.xlsx.

Explain the issues that exist with maintaining the data in its current form.
Explain the process of migrating the data in its current form to a well formed data model by highlighting the following in detail:
Identify required attributes that need to be tracked
Identify functional dependencies Show the redesign in 1NF, 2NF, and 3NF (similar to figures 7.29, 7.31, 7.33)
Explain the benefits of the data in its new form.
Create the E-R diagram of your relational tables using MySQL Workbench.
Provide the SQL statement required to create at least one of your tables.
Provide the SQL statement required to delete at least one of your tables.
Provide the SQL statement required to create a view which includes Course #, Course Name, Time, and Days only.
Identify at least one index, which you believe would improve performance.
Explain your choice.
Propose some additional data items, which you believe may be beneficial to the University if tracked in your database (i.e. Descriptions, more info about the instructors and students, departments, etc).
Describe the steps required to implement these additions.
If you add a course description attribute to your course table, there may be some performance impacts imposed by the addition of this text field.
Discuss a physical design technique to improve the performance of the new course description field.

IM300 Week 5 Learning Team Analyze the Execution Plan Letter

A member of your team questions the necessity of an execution plan for the new database system. You reply in a letter.
Resources: University of Phoenix Material: Execution Plan Instructions
Analyze the execution plan created by the database using the query and instructions found in the Execution Plan Instructions document.

Write a draft of your business letter to a database administrator including the following:
An explanation of why it is important for them to understand execution plans.
How execution plans can be used to improve the performance of the database.
Format your letter consistent with APA guidelines.
The execution plan is attached which I ran against the oracle DB HR and the attached pictures are the result.

Student Database Oracle DDL and Queries

Create the following tables.
STUDENT
Student Number (PK)
Student Last Name
Student Major
Department ID (FK)
Student GPA
Student Hours
Student Class
Advisor ID (FK)

ADVISOR
Advisor ID (PK)
Advisor Last Name
Advisor Office
Advisor Building
Advisor Phone

DEPARTMENT
Department ID (PK)
Department Code
Department Name
Department Phone

*NOTE* You will have to decide on how to handle the Department and Advisor ID foreign keys in terms of a numbering system as well as appropriate field widths and types for the fields.
The business rules which govern this database are: A student may have one advisor while an advisor may advise multiple students. A student belongs to only one department but each department can have many students.
Populate the table with data from Table P6.4 (p. 217).

There is an error in the book! Change Ortiz’s student number to be 200888. In addition, add these three students to your database.
STU_NUM 123984 995133 367181
STU_LNAME Freeman Wilder Green
STU_MAJOR CIT CIT BIS
DEPT_CODE CS CS IS
DEPT_NAME Computer Science Computer Science Business Informatics
DEPT_PHONE 5234 3951 3951
COLLEGE_NAME Informatics Informatics Informatics
ADVISOR_LNAME Strand Zhang Goh
ADVISOR_BLDG Griffin Griffin Griffin
ADVISOR_OFFICE 5132 3451 5612
ADVISOR_PHONE 1603 3512 7922
STU_GPA 2.5 3.9 2.3
STU_HOURS 97 58 63
STU_CLASS Senior Junior Junior

Part 1
Provide all DDL-related code. This includes table definition and creation, fk/pk creation, and populating the tables with data. Please include the output from Oracle that shows that everything was created correctly.

Part 2
Queries – For each query provide 1) What the output, specifically, should be based upon eyeballing the data 2) the SQL code used to generate the query, and 3) the output from Oracle. Please include any relevant fields you think the user of the query would need to interpret the output.
1. Advisors need the capability to generate a query that returns *all* student information based upon a student number. This will help them in the advisement process. Create a query that returns all information for student Freeman from each table.
2. Each year, college administrators need to know how many students are in each major. Create a query that counts the number of students in each major while displaying the major name.
3. Kroger has approached NKU with an internship opportunity! The business department chair needs to generate a mailing list to inform great students about a job opportunity. Create a query that shows all the student numbers, last names, majors, department names, and advisor’s last name for students in Business Admin. Students should have a minimum GPA of 2.5 or greater to be on this mailing list. List in ascending order of GPA.
4. To get an idea of the adequacy of admission standards, NKU needs to have an idea of the breakdown of students. By each college, show the number of students in each classification (freshmen, sophomore, junior, senior).
5. Due to a fire, Griffin Hall has burnt down. Write a SQL statement that updates all faculty who had offices in Griffin Hall to now be housed in the University Center.
6. New funding may be able to pay for an advising center. The dean would like to get an idea of how many students each faculty member currently advises. Create a query that shows the names and majors of students for each advisor along with the advisor’s name.
7. (Extra credit) Create a query that counts the number of students who are eligible for the Dean’s list (GPA >= 3.5) in each department.