📘 LeetCode SQL 50 – Solutions by Sanchay Kumar Singh

Welcome to my repository! 🚀 This project contains my solutions to the LeetCode SQL 50 problems, where I have practiced and mastered essential SQL concepts through hands-on problem solving.

✨ About This Repo

✅ Contains clean and optimized solutions for all 50 LeetCode SQL problems

✅ Written in MySQL syntax (easily adaptable to other SQL flavors)

✅ Includes queries for basic, intermediate, and advanced SQL challenges

✅ Well-formatted and easy to understand for learners and interview prep

📂 Structure

Each problem is organized by problem name / number

Query file contains:

Problem statement (short summary )

My SQL solution

🎯 What I Learned

SELECT, WHERE, ORDER BY, LIMIT basics

JOINs (INNER, LEFT, RIGHT, SELF)

GROUP BY, HAVING, Aggregations

Window functions (RANK, DENSE_RANK, ROW_NUMBER)

Subqueries & Nested Queries

CASE WHEN conditions

Name: Sanchay Kumar Singh
Email: (mailto:sanchaysingh62425@gmail.com)
GitHub:https://github.com/Sanchay-Kumar-Singh
LinkedIn:https://www.linkedin.com/in/sanchay-kumar-singh-a48155297/