SQL Practice

This repository contains my personal SQL practice notes and solutions
from platforms like LeetCode and HackerRank.

The goal is not just to solve questions, but to build strong analytical thinking
and improve how I reason about data.

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What This Repo Includes

• Solved SQL problems from HackerRank and LeetCode
• Clean, readable queries
• Gradual progression from basics to advanced concepts
• Focus on understanding why a query works

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Topics Covered (Growing)

• Basic data retrieval (SELECT, WHERE, ORDER BY)
• Filtering & conditions
• Aggregations & grouping
• Joins & relationships
• Subqueries & CTEs
• Window functions (planned)

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Structure

SQL-Practice/
├── HackerRank-Questions/
│   └── BasicSelect/
├── LeetCode-Questions/
│   └── (coming soon)

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Notes

• This is a learning repository, not a polished library
• Queries may be refactored as my understanding improves
• Solutions reflect my thinking at the time of solving

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Why I’m Doing This

I’m learning SQL and Data Analytics to:

• Think more clearly about data
• Ask better product and business questions
• Make more informed decisions as a builder
• Share my learning journey with others
• Build a habit of continuous improvement

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_{Learning in public. Improving one query at a time. Feel free to explore and learn along with me!}