Enhance Documentation for SQL Queries

[chewbacca1991]

Issue

The current README provides a general overview of the SQL queries used in the project, but it lacks detailed documentation on the specific SQL queries, their purposes, and expected outputs. This can make it challenging for new contributors or users to understand how to best use the SQL components of the project.

Suggested Improvement

1. Add a Section for SQL Queries: Include a dedicated section in the README that lists all SQL queries used in the project.
2. Describe Each Query: For each query, provide a brief description that outlines what data it extracts and why it is important.
3. Include Sample Outputs: If possible, add example outputs or a description of the data structure returned by each query. This would help users understand the results they should expect.

Enhancing the documentation for SQL queries will improve the usability of the project and assist newcomers in effectively utilizing the SQL aspects of the analysis.