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README.md

SQL

🚀 Advanced SQL Projects with MySQL

To master complex queries, performance optimization, and database design, here are some real-world SQL project ideas:

🔹 1. E-Commerce System (Amazon-like)

📌 Concepts: Joins, Transactions, Indexing, Triggers, Partitioning
✅ Practice:

  • Orders & Payments: Track order status, payments, and invoices.
  • Inventory Management: Auto-update stock levels when an order is placed.
  • Customer Segmentation: Find top buyers, abandoned carts, and product trends.
  • Discounts & Promotions: Apply conditional discounts dynamically.
  • Optimized Search: Use FULLTEXT indexing for product search.

📌 Tables: users, products, orders, order_items, payments, reviews

🔹 2. Social Media Analytics (Facebook/Twitter-like)

📌 Concepts: Recursive Queries, Window Functions, Ranking
✅ Practice:

  • Friends & Followers System: Implement a friends table with self-referencing joins.
  • Trending Posts: Find posts with the most likes/comments in the last 24 hours.
  • Hashtags & Mentions: Query trending hashtags dynamically.
  • User Engagement Analysis: Rank users based on activity.
  • Notifications System: Track unread messages, mentions, likes.

📌 Tables: users, posts, comments, likes, followers, notifications

🔹 3. Online Learning Platform (Udemy-like)

📌 Concepts: Many-to-Many Relationships, Stored Procedures, Views
✅ Practice:

  • Course Enrollment: Track students who enroll in multiple courses.
  • Instructor Revenue: Calculate earnings per instructor.
  • Quiz & Exam Scores: Analyze student performance.
  • Course Recommendations: Suggest courses based on past enrollments.
  • Progress Tracking: Show percentage completion per course.

📌 Tables: students, courses, enrollments, lessons, quizzes, payments

🔹 4. Hotel Booking System (Booking.com-like)

📌 Concepts: Date Functions, Indexing, Query Optimization
✅ Practice:

  • Room Availability: Check if a room is available for specific dates.
  • Pricing Logic: Apply seasonal price variations dynamically.
  • Cancellation Policy: Handle partial/full refunds for cancellations.
  • Revenue Analysis: Generate reports on bookings and revenue trends.
  • Customer Preferences: Suggest rooms based on past stays.

📌 Tables: customers, hotels, rooms, bookings, payments, reviews

🔹 5. Banking System (Finance App)

📌 Concepts: ACID Transactions, Views, Security
✅ Practice:

  • Money Transfers: Ensure atomic transactions to prevent partial transfers.
  • Loan & Interest Calculation: Apply compound interest dynamically.
  • Fraud Detection: Identify unusual transactions using patterns.
  • Audit Logs: Store all account activities securely.
  • User Roles: Implement role-based access (admin, teller, customer).

📌 Tables: accounts, transactions, loans, users, audit_logs

🔹 6. Healthcare Management System

📌 Concepts: Complex Joins, Nested Queries, Triggers
✅ Practice:

  • Patient Records: Store medical history, diagnoses, and treatments.
  • Appointment Scheduling: Prevent double-booking for doctors.
  • Billing & Insurance: Track payments and insurance claims.
  • Medication Tracking: Send alerts for prescription refills.
  • Doctor Availability: Query available doctors for specific time slots.

📌 Tables: patients, doctors, appointments, medications, payments

🔹 7. Ride-Sharing App (Uber-like)

📌 Concepts: Geospatial Queries, Real-Time Data Analysis
✅ Practice:

  • Driver Matching: Assign drivers based on proximity and availability.
  • Trip Fare Calculation: Compute fares based on distance/time.
  • User Ratings: Rank drivers and passengers based on feedback.
  • Peak Pricing: Increase fares dynamically during high demand.
  • Ride History: Generate reports on completed trips.

📌 Tables: users, drivers, trips, payments, ratings

🔹 8. Library Management System

📌 Concepts: Triggers, Stored Procedures, Fine Calculation
✅ Practice:

  • Book Borrowing System: Track who borrowed books and due dates.
  • Late Fee Calculation: Auto-calculate fines for overdue books.
  • Book Reservations: Allow users to hold books when unavailable.
  • Search & Categorization: Use FULLTEXT indexing for title/author searches.
  • Most Borrowed Books: Find the most popular books per month.

📌 Tables: books, members, borrowed_books, reservations, fines

🔹 9. HR & Payroll System

📌 Concepts: Recurring Payments, Employee Attendance
✅ Practice:

  • Employee Attendance: Track daily work hours and leaves.
  • Payroll Processing: Automate salary calculations with tax deductions.
  • Department-Wise Analysis: Generate reports on employee performance.
  • Promotion & Bonus System: Handle salary raises and bonuses.
  • Resignation & Hiring Process: Manage employee exits and new hires.

📌 Tables: employees, departments, salaries, attendance, leaves

🔹 10. Airline Reservation System

📌 Concepts: Seat Allocation, Ticket Pricing, Cancellations
✅ Practice:

  • Seat Availability: Check and book available seats.
  • Dynamic Pricing: Increase fares as seats fill up.
  • Passenger Check-in: Track who has checked in for flights.
  • Flight Cancellations: Handle rebooking or refunds.
  • Loyalty Program: Reward frequent flyers with discounts.

📌 Tables: flights, passengers, bookings, payments, loyalty_points

🎯 What You’ll Learn

By working on these projects, you’ll master: ✅ Joins & Subqueries
✅ Transactions & Indexing
✅ Stored Procedures & Triggers
✅ Views & Partitioning
✅ Window Functions & Performance Optimization

Would you like help designing any specific project schema? 🚀