SQL Practice 2026

A structured collection of SQL practice problems and case studies solved using PostgreSQL. This repository documents my hands-on SQL learning journey through practical business scenarios and interview-oriented exercises.

Tech Stack

• PostgreSQL
• pgAdmin 4
• Git & GitHub

Repository Structure

SQL-Practice-2026
│
├── DDL_DML
├── DQL
├── GROUP_BY
├── JOINS
├── SUBQUERIES
├── WINDOW_FUNCTIONS
└── TOP_75_SQL

Topics Covered

• Data Definition Language (DDL)
• Data Manipulation Language (DML)
• Data Query Language (DQL)
• Filtering & Sorting
• Aggregate Functions
• GROUP BY & HAVING
• Joins
• Subqueries
• Common Table Expressions (CTEs)
• Window Functions
• SQL Case Studies
• SQL Interview Questions

Objective

The goal of this repository is to strengthen SQL fundamentals through consistent hands-on practice and real-world case studies while building a solid foundation for Data Analytics, AI/ML, and Software Engineering roles.

Repository Status

This repository is continuously updated as I complete new SQL topics and case studies.