SQL

A hands-on SQL learning repository: a full modern SQL curriculum, an interview-prep drill pack, and a real-world dataset to practice against.

What's here

Curriculum/ — the main course. A 16-phase, project-based SQL curriculum (Database Fundamentals → Cloud SQL) built for 2026 Data Analyst / Data Scientist / Analytics Engineer / Data Engineer / BI Developer / ML Engineer job readiness. Every topic has notes, diagrams, runnable examples, exercises with solutions, and a project. Start here: Phase 1 — SQL Foundations.
Interviews/ — a 25-topic SQL interview-prep pack (MySQL) with practice.sql / solution.sql pairs per topic, best tackled after finishing the curriculum.
Olist_dataset/ — the real Brazilian e-commerce (Olist) dataset from Kaggle, used for larger, messier, real-world-style practice once you're past the fundamentals.

New to SQL? Go to Curriculum/README.md and follow Phase 1 in order. Already comfortable with the basics and prepping for interviews? Jump to Interviews/README.md.