A collection of SQL query examples and exercises to enhance your database querying skills. This repository contains real-world SQL problems covering customer transactions, product sales, employee records, and more. Perfect for learning SQL, preparing for interviews, or practicing database management.
This repository is a curated collection of SQL queries ranging from beginner to advanced levels. The queries are designed to help you:
✅ Improve your SQL skills
✅ Understand complex queries and optimizations
✅ Prepare for SQL-related interviews
✅ Work with different database management systems (MySQL, PostgreSQL, etc.)
Here are some of the SQL exercises included in this repository:
| File Name | Description |
|---|---|
01_recyclable-and-low-fat-products.sql |
Find recyclable and low-fat products |
02_find_customer.sql |
Find customers who referred others |
03_big_countries.sql |
Identify big countries |
04_articles_views.sql |
Analyze article views |
05_invalid_tweet.sql |
Detect invalid tweets |
06_employee_id.sql |
Replace Employee ID with a unique identifier |
07_product_sale.sql |
Analyze product sales |
08_visited.sql |
Identify customers who visited but didn't make transactions |
More queries will be added soon! 🔥
- Clone the repository:
git clone https://github.com/hilalahmad0101/sql-quries-examples.git
- Open the SQL files in any SQL editor (MySQL Workbench, PostgreSQL, SQLite, etc.).
- Run the queries on a sample database and analyze the results.
- Modify and experiment with the queries to deepen your understanding.
Contributions are welcome! If you have an interesting SQL query or optimization technique, feel free to open a pull request.
How to contribute:
- Fork this repository
- Add your SQL query in a new file following the existing format
- Create a pull request
This project is licensed under the MIT License – feel free to use, modify, and share.
SQL Database SQL Queries SQL Practice SQL Exercises Database Management MySQL PostgreSQL SQL Interview Questions Data Analysis SQL Examples