SQL-Case-Study

📊 A collection of real-life SQL case studies with solutions and optimized queries for analytics and problem-solving.

🚀 Overview

This repository contains structured SQL case studies inspired by real-world scenarios such as fraud detection, customer analytics, banking systems, and more.
Each case study includes:

• Problem statement
• Normalized schema design
• Functional and multivalued dependencies
• SQL queries with solutions
• Explanations for approaches

The goal is to practice SQL for Data Engineering, Analytics, and Problem Solving while tackling real-world challenges.

📌 Case Studies Included

• Banking Fraud Detection & Customer Analytics
  Detect suspicious transactions, analyze customer spending behavior, and identify unusual patterns.

• Retail Sales Analytics (upcoming)
  Product performance tracking, customer segmentation, and revenue optimization.

• Healthcare Data Analysis (upcoming)
  Patient trends, hospital resource allocation, and predictive insights.

🛠️ Technologies Used

• Database: MySQL (compatible with PostgreSQL & other SQL engines)
• Concepts: Normalization, Functional Dependencies, Multivalued Dependencies, Window Functions, Ranking, Aggregations

🎯 Who Is This For?

• Students learning SQL with real-world applications
• Data Engineers & Analysts practicing advanced SQL queries
• Developers preparing for case study-based interviews

🤝 Contribution

Contributions are welcome! If you’d like to add a new case study:

1. Fork the repo
2. Create a new folder with schema, queries, and README
3. Open a pull request

📜 License

This repository is licensed under the MIT License – free to use, share, and modify.

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✨ Explore real-world SQL problems and level up your data skills!