Claude-Hanfou / Employee-Database-SQL

Research project on employees of Pewlett Hackard from the 1980s and 1990s.

Employee Database Analysis

Objective

Research project on employees of Pewlett Hackard from the 1980s and 1990s.

This project contains six csv files which are all stored in the Data folder and were used for this analysies. The csv files are :

• Departments
• Department Employees
• Department Manager
• Employees
• Salaries
• Titles

Pewlett Hackard ERD

This is an ERD image shows the relationship between the various tables

Findings

The following information were extracted from the csv files

• For each employee: employee number, last name, first name, sex, and salary

• The first name, last name, and hire date for employees who were hired in 1986.

• The manager of each department with the following information: department number, department name, the manager's employee number, last name, first name.

• The department of each employee with the following information: employee number, last name, first name, and department name.

• The first name, last name, and sex for employees whose first name is "Hercules" and last names begin with "B."

• The employees in the Sales department, including their employee number, last name, first name, and department name.

• The employees in the Sales and Development departments, including their employee number, last name, first name, and department name.

In descending order, list the frequency count of employee last names, i.e., how many employees share each last name.

Common Salary Ranges for Employees.

.PNG "Fig1")

Average Salary by Title