https://github.com/cyberoctane29/hackerrank-sql-problem-solving
This repository includes my SQL problem-solving approach and solutions to HackerRank challenges, organized by difficulty level: Easy, Medium, and Hard. Each challenge has its own solution file with clear explanations to make the reasoning easy to follow. I aim to share my thought process, logic, and approach behind each answer.
https://github.com/cyberoctane29/hackerrank-sql-problem-solving
hackerrank hackerrank-solutions mysql sql
Last synced: 1 day ago
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This repository includes my SQL problem-solving approach and solutions to HackerRank challenges, organized by difficulty level: Easy, Medium, and Hard. Each challenge has its own solution file with clear explanations to make the reasoning easy to follow. I aim to share my thought process, logic, and approach behind each answer.
- Host: GitHub
- URL: https://github.com/cyberoctane29/hackerrank-sql-problem-solving
- Owner: Cyberoctane29
- Created: 2024-10-21T15:48:35.000Z (9 months ago)
- Default Branch: main
- Last Pushed: 2025-06-01T04:34:00.000Z (about 1 month ago)
- Last Synced: 2025-06-01T13:52:35.157Z (about 1 month ago)
- Topics: hackerrank, hackerrank-solutions, mysql, sql
- Language: SQL
- Homepage: https://www.hackerrank.com/profile/saswatsethTechie
- Size: 2.36 MB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# 🗄️ HackerRank SQL Problem Solving
Welcome to my **HackerRank SQL Problem Solving** repository!
This repository contains my SQL problem solving approach and solutions to HackerRank challenges, systematically categorized by difficulty level:
- **Easy**
- **Basic**
- **Intermediate**
- **Advanced**
- **Medium**
- **Basic**
- **Intermediate**
- **Advanced**
- **Hard**
- **Intermediate**
- **Advanced**
Each problem has its own dedicated SQL file, which includes:
- **Problem Explanation** – A brief overview of the problem statement.
- **Solution Intuition** – The thought process and reasoning behind the approach taken.
- **SQL Query** – A well-structured solution to the problem.
- **Alternative Solutions** (if applicable) – Some problems feature multiple solutions for optimization or to explore different approaches.
## Why This Repository?
This collection serves as a structured reference for:
- Learning **SQL techniques** through real-world problems.
- Understanding different ways to solve SQL queries efficiently.
- Exploring **query optimizations** and alternative methods for better performance.
- Gaining insights into **SQL patterns** commonly used in technical interviews.
## Repository Structure
```sql
-- Hackerrank-SQL-Solutions/
-- │── Easy/
-- │ ├── Easy-Basic/
-- │ │ ├── problem_name_1.sql
-- │ │ ├── problem_name_2.sql
-- │ ├── Easy-Intermediate/
-- │ │ ├── problem_name_3.sql
-- │ │ ├── problem_name_4.sql
-- │ ├── Easy-Advanced/
-- │ │ ├── problem_name_5.sql
-- │ │ ├── problem_name_6.sql
-- │── Medium/
-- │ ├── Medium-Basic/
-- │ │ ├── problem_name_7.sql
-- │ │ ├── problem_name_8.sql
-- │ ├── Medium-Intermediate/
-- │ │ ├── problem_name_9.sql
-- │ │ ├── problem_name_10.sql
-- │ ├── Medium-Advanced/
-- │ │ ├── problem_name_11.sql
-- │ │ ├── problem_name_12.sql
-- │── Hard/
-- │ ├── Hard-Intermediate/
-- │ │ ├── problem_name_13.sql
-- │ │ ├── problem_name_14.sql
-- │ ├── Hard-Advanced/
-- │ │ ├── problem_name_15.sql
-- │ │ ├── problem_name_16.sql
```
## Example Solution Format
```sql
-- Problem: [Problem Title]
-- Difficulty: [Easy/Medium/Hard]
-- SQL Schema
-- Table: [Table Name]
-- +-------------+---------+
-- | Column Name | Type |
-- +-------------+---------+
-- | column_1 | type |
-- | column_2 | type |
-- +-------------+---------+
-- [Primary key and other constraints]
-- Problem Statement
-- [Provide a brief problem description.]
-- Solution:
-- [Explain the approach used in the solution.]
SELECT column_1, column_2
FROM TableName
WHERE some_condition;
-- Intuition:
-- [Describe the core idea behind solving this problem. Explain the thought process used to arrive at the solution.]
-- Explanation:
-- [Explain why this approach works effectively and break down the logic of the code step by step.]
```
Whether you're just starting with SQL or looking to refine your skills, I hope this resource helps you tackle real-world problems and improves your problem-solving ability.
Let’s learn and grow together! 🚀 Happy coding! 🎯