priyadharsinid / sql-database-analysis

Analysis of Employee data.

sql-database-analysis

This project involves analyzing a SQL database by completing the following tasks:

Data Modeling:

Inspect the CSV files and sketch an Entity Relationship Diagram (ERD) of the tables.

Data Engineering:

Create a table schema for each of the six CSV files, specifying data types, primary keys, foreign keys, and other constraints. Import each CSV file into the corresponding SQL table.

Data Analysis:

List details of each employee, including employee number, last name, first name, gender, and salary. List employees who were hired in 1986. List the manager of each department, including department number, department name, manager's employee number, last name, first name, and start and end employment dates. List the department of each employee, including employee number, last name, first name, and department name. List all employees whose first name is "Hercules" and last names begin with "B." List all employees in the Sales department, including their employee number, last name, first name, and department name. List all employees in the Sales and Development departments, including their employee number, last name, first name, and department name. List the frequency count of employee last names in descending order, showing how many employees share each last name.

Each task involves querying the SQL database to retrieve specific information and gain insights into the employee data.

Requirements:

• SQL database management system - PostgreSQL

• SQL database client - pgAdmin

• ERD tool for sketching Entity Relationship Diagrams - QuickDBD