Master SQL Directly in Your Browser
Go from zero to job-ready SQL skills with 93 hands-on lessons, a real SQLite database running in your browser, and an AI tutor that guides you through every query. No installation required.
How This Course Works
Four simple steps from beginner to SQL-proficient
Read the Lesson
Each lesson starts with a concise theory section explaining the SQL concept with clear examples and key takeaways.
Write Your Query
Switch to the Lab tab and write SQL against a real Chinook music-store database. See results instantly in your browser.
Check Your Answer
Click "Check Answer" for instant validation. If stuck, ask the AI Tutor for a hint — it won't just give you the answer.
Track & Advance
Your progress is saved automatically. Complete all lessons to unlock a certificate and take the Mock Interview challenge.
Course Curriculum
A structured path through everything you need to know
Introduction
1 lesson · What is SQL and why it matters
Database Structures
3 lessons · Tables, rows, columns, keys
The SQL Stack
4 lessons · DDL, DML, DQL overview
SQLite Environment
6 lessons · Navigating the playground
Composing Queries
10 lessons · SELECT, WHERE, ORDER BY
Discovering Insights
13 lessons · Filtering, aggregates, LIKE
Joins & Multi-Table
13 lessons · INNER, LEFT, CROSS joins
SQL Functions
11 lessons · String, numeric, date functions
Grouping
9 lessons · GROUP BY, HAVING, rollups
Nesting Queries
9 lessons · Subqueries, CTEs, correlated
Views
6 lessons · CREATE VIEW, stored queries
Data Manipulation
5 lessons · INSERT, UPDATE, DELETE
Mock SQL Interview
3+ scenarios · Timed real-world challenges
What Makes This Course Different
Built for practical, hands-on learning
In-Browser SQLite
A full SQLite engine runs in your browser via WebAssembly. Write real SQL — no server, no installation, no setup.
AI Tutor (Gemini)
Stuck on a query? The AI tutor gives you guided hints — not the answer — so you genuinely learn the concept.
Chinook Dataset
Practice on the industry-standard Chinook music-store database with artists, albums, invoices, and customers.
Text-to-Speech
Listen to lessons read aloud while you follow along. Great for auditory learners and accessibility.
Certificate
Complete all 93 lessons to earn a personalized certificate you can share on LinkedIn or with employers.
Mock Interview
Test your skills with timed SQL interview scenarios modeled after real technical screenings at top companies.
Prerequisites
None. This course starts from absolute zero. All you need is a modern web browser. If you've never written a line of code before, you're in the right place.
Your progress is saved automatically. Pick up where you left off anytime.