HackerRank-SQL-Solutions

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HackerRank-SQL-Solutions

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This repository contains SQL solutions to various problems from HackerRank, organized by topic and difficulty for easy access and learning.

HackerRank-SQL-Solutions 최신버젼 다운로드

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# 🗃️ HackerRank SQL Repository

This repository contains SQL solutions to various problems from HackerRank, organized by topic and difficulty for easy access and learning.

---

## 📁 Folder Structure

```

Today/
├── Basic\_Select/             # Problems on basic SELECT queries
├── Advance\_Select/           # Advanced SELECT queries including patterns and conditions
├── Aggregation/              # SUM, COUNT, AVG, and GROUP BY operations
├── Basic\_Join/               # Introduction to JOIN operations
├── Advance\_join/             # Complex JOIN queries
└── Alternative\_Queries/      # Problems using alternative logic and custom SQL tricks

```

---

## 📌 Usage

- Each folder contains `.sql` files named after the respective HackerRank problems.
- Open the `.sql` file in your SQL editor to view or run the query.
- Great for revision, interviews, or strengthening SQL fundamentals.

---

## 📚 Topics Covered

- ✅ SELECT Statements
- ✅ Filtering & Sorting
- ✅ Aggregations (COUNT, SUM, AVG, etc.)
- ✅ JOINs (INNER, LEFT, RIGHT)
- ✅ Subqueries & Alternative Logic
- ✅ Pattern Matching and Conditional Logic

---

## 🌟 Contribute

Feel free to fork the repo and contribute more problem solutions or corrections.

---

## 📧 Contact

For any suggestions or questions, please raise an issue or drop a message.

---

**Happy Querying! 🚀**
```

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