https://github.com/ivanbyone/leetcode-sql

LeetCode SQL Solutions in PostgreSQL
https://github.com/ivanbyone/leetcode-sql

leetcode leetcode-solutions leetcode-sql leetcode-sql-50 postgresql sql

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LeetCode SQL Solutions in PostgreSQL

• Host: GitHub
• URL: https://github.com/ivanbyone/leetcode-sql
• Owner: Ivanbyone
• License: mit
• Created: 2025-06-28T10:42:22.000Z (7 days ago)
• Default Branch: main
• Last Pushed: 2025-06-29T10:28:21.000Z (6 days ago)
• Last Synced: 2025-06-29T10:31:26.992Z (6 days ago)
• Topics: leetcode, leetcode-solutions, leetcode-sql, leetcode-sql-50, postgresql, sql
• Language: PLpgSQL
• Homepage:
• Size: 11.7 KB
• Stars: 1
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Leetcode (PostgreSQL)

![Postgres](https://img.shields.io/badge/postgres-%23316192.svg?style=for-the-badge&logo=postgresql&logoColor=white)

[![MIT licensed](https://img.shields.io/badge/License-MIT-yellow.svg)](./LICENSE)

[![CI](https://github.com/ivanbyone/leetcode-sql/actions/workflows/ci.yml/badge.svg)](https://github.com/Ivanbyone/leetcode-sql//actions)

## Description

📚 LeetCode SQL Solutions in PostgreSQL

A collection of LeetCode solutions in SQL using PostgreSQL. Includes:

- Easy/Medium/Hard solutions

- Optimized queries

🔹 Features:

- Clean, formatted SQL code

- Use of PostgreSQL-specific functions

- Parsing complex queries

- Regular updates

Useful for preparing for technical interviews and improving your SQL skills.

### Contributing

Style guide for contributors:

1. Add description to all tasks from Leetcode.

2. Name file pattern: xxx.Task name.sql

3. All keywords must be uppercase.

4. For every task create new branch with pattern: task/task-name -> make PR to main.

Have a good contributing! 

## Task List

1. [Easy](./leetcode/easy/)

    - [175. Combine Two Tables](./leetcode//easy/175.%20Combine%20Two%20Tables.sql)

    - [181. Employees Earning More Than Their Managers](./leetcode/easy/181.%20Employees%20Earning%20More%20Than%20Their%20Managers.sql)

    - [182. Duplicate Emails](./leetcode/easy/182.%20Duplicate%20Emails.sql)

    - [183. Customers Who Never Order](./leetcode/easy/183.%20Customers%20Who%20Never%20Order.sql)

    - [511. Game Play Analysis 1](./leetcode/easy/511.%20Game%20Play%20Analysis%201.sql)

    - [577. Employee Bonus](./leetcode/easy/577.%20Employee%20Bonus.sql)

    - [586. Customer Placing the Largest Number of Orders](./leetcode/easy/586.%20Customer%20Placing%20the%20Largest%20Number%20of%20Orders.sql)

    - [595. Big Countries](./leetcode/easy/595.%20Big%20Countries.sql)

    - [596. Classes With at Least 5 Students](./leetcode/easy/596.%20Classes%20With%20at%20Least%205%20Students.sql)

    - [610. Triangle Judgement](./leetcode/easy/610.%20Triangle%20Judgement.sql)

    - [619. Biggest Single Number](./leetcode/easy/619.%20Biggest%20Single%20Number.sql)

    - [620. Not Boring Movies](./leetcode/easy/620.%20Not%20Boring%20Movies.sql)

    - [1068. Product Sales Analysis I](./leetcode/easy/1068.%20Product%20Sales%20Analysis%20I.sql)

2. [Medium](./leetcode/medium/)

    - [176. Second Highest Salary](./leetcode/medium/176.%20Second%20Highest%20Salary.sql)

    - [184. Department Highest Salary](./leetcode/medium/184.%20Department%20Highest%20Salary.sql)

    - [1045. Customers Who Bought All Products](./leetcode/medium/1045.%20Customers%20Who%20Bought%20All%20Products.sql)

    - [1070. Product Sales Analysis III](./leetcode/medium/1070.%20Product%20Sales%20Analysis%203.sql)

    - [1158. Market Analysis 1](./leetcode/medium/1158.%20Market%20Analysis%201.sql)

## License

Check out LICENSE [page](./LICENSE).