CODE A GRATIS GLOBAL SERVICE
⌕ SEARCH GRATIS GLOBAL ↗
FREE GUIDE

Learn SQL Free

SQL is the universal language for querying and managing relational databases, essential for analytics, backend engineering and data work. These free courses, interactive practice sites, tools and communities will take you from your first SELECT statement through joins, indexing and real world query optimization.

10 SECTIONS · 63 RESOURCES · STATUS: [ ALL LINKS FREE ]
► INSIDE THIS GUIDE 10 SECTIONS
01

Free Online SQL Courses

8 RESOURCES
CS50's Introduction to Databases with SQL cs50.harvard.edu

Harvard's rigorous free database course covering SQLite, PostgreSQL and MySQL with hands on problem sets.

CS50 SQL on edX edx.org

The same Harvard course hosted on edX with a free audit track for the materials and forums.

DavidsonX: Introduction to SQL (edX) edx.org

A free to audit college level intro course teaching SQL for aggregating and analyzing data.

Databases: Relational Databases and SQL (Stanford Online) online.stanford.edu

Stanford's well regarded mini course by Jennifer Widom, free, with video lectures plus auto graded exercises.

Khan Academy: Intro to SQL khanacademy.org

A fully free, fully interactive course teaching SQL basics through joins and modifying databases directly in browser.

Mode SQL Tutorial mode.com

A free structured course covering basic, intermediate and advanced SQL, built for aspiring analysts with real datasets.

freeCodeCamp: SQL and Databases Full Course freecodecamp.org

A full free beginner course covering schema design and CRUD operations using MySQL.

freeCodeCamp: SQL for Analytics freecodecamp.org

An 11 hour free deep dive course for handling complex analytical queries, taught by a senior data engineer.

02

Free SQL Video Lessons and YouTube Channels

7 RESOURCES
freeCodeCamp.org (SQL articles and courses) freecodecamp.org

A nonprofit publisher with multiple full length free SQL courses spanning beginner to advanced topics.

Corey Schafer SQL Tutorials youtube.com

Clear, methodical PostgreSQL based tutorials on database creation, table management and CRUD operations.

Traversy Media SQL Crash Course classcentral.com

A beginner to intermediate MySQL crash course covering tables, queries, joins, constraints and indexes hands on.

kudvenkat SQL Server Tutorial for Beginners youtube.com

A very extensive playlist teaching SQL Server from fundamentals through stored procedures and performance tuning.

Khan Academy Intro to SQL YouTube Playlist youtube.com

The video companion to Khan Academy's interactive SQL course, good for visual learners who want the same content on YouTube.

Harvard CS50 SQL Full Course (freeCodeCamp upload) classcentral.com

The full Harvard CS50 SQL lecture series uploaded as one free long form video course.

Mastering SQL for Web Developers (freeCodeCamp) freecodecamp.org

A full free course by a senior backend engineer aimed at web developers who need practical SQL skills.

03

Free Online SQL Tutorials

6 RESOURCES
W3Schools SQL Tutorial w3schools.com

The most widely used free text tutorial with an inline online SQL editor to run examples as you read.

GeeksforGeeks SQL Tutorial geeksforgeeks.org

A comprehensive free written tutorial spanning basics through query optimization and stored procedures.

SQLBolt sqlbolt.com

Bite sized interactive lessons that build muscle memory for SELECT, JOIN, aggregates and schema commands directly in browser.

Mode SQL Tutorial (text walkthrough) mode.com

A text based walkthrough of running SQL inside Mode's own free analytics environment.

The SQL Handbook (freeCodeCamp) freecodecamp.org

A free written course style article using SQLite, good for a lightweight browser based first pass at syntax.

Learn SQL for Efficient Data Storage and Retrieval (freeCodeCamp) freecodecamp.org

A long form free written guide covering core relational database concepts and query writing.

04

Free Online SQL Practice and Interactive Exercises

8 RESOURCES
SQLZoo sqlzoo.net

A long running, free interactive platform where you run real queries against live databases and see instant results.

HackerRank SQL Domain hackerrank.com

58 free SQL challenges spanning basic select statements through advanced joins and aggregation.

LeetCode SQL Problems leetcode.com

50 free SQL problems modeled on real interview questions, useful for pattern recognition practice.

PostgreSQL Exercises (PGExercises) pgexercises.com

A focused set of free questions and explanations built around one dataset, meant as a practice companion to Postgres docs.

DataLemur datalemur.com

A free tier that lets you solve 200 plus real FAANG style SQL interview questions with instant feedback.

W3Schools SQL Exercises w3schools.com

Quick multiple choice and fill in the blank exercises for reinforcing syntax right after reading the tutorial.

GeeksforGeeks PostgreSQL Exercises geeksforgeeks.org

50 free PostgreSQL exercises across basic, medium and advanced difficulty.

The Odin Project: SQLZoo Lesson theodinproject.com

A free open source curriculum module that walks learners through SQLZoo as a structured assignment.

05

Free SQL Books and Documentation

7 RESOURCES
PostgreSQL Official Documentation postgresql.org

The authoritative, always current reference for PostgreSQL syntax, functions and internals, entirely free.

MySQL Reference Manual dev.mysql.com

Official, comprehensive and free documentation covering every MySQL feature and SQL statement.

SQLite Documentation sqlite.org

Official docs for the lightweight, serverless database engine, useful for understanding SQL fundamentals without a server setup.

Use The Index, Luke! use-the-index-luke.com

A free, vendor agnostic web edition book by Markus Winand explaining SQL indexing and query performance clearly.

SQL Notes for Professionals (GoalKicker) books.goalkicker.com

A free, community compiled PDF book covering SQL syntax and practical examples, sourced from Stack Overflow documentation.

Introduction to SQL (bobbyiliev, GitHub) github.com

A free, open source introductory SQL ebook aimed at developers and sysadmins learning the basics.

Free SQL Books collection (freecomputerbooks.com) freecomputerbooks.com

A curated aggregator list linking to many free SQL books, lecture notes and references in one place.

06

Free SQL IDEs, Editors and Developer Tools

7 RESOURCES
DBeaver Community Edition dbeaver.io

A free, open source, cross platform database tool supporting Postgres, MySQL, SQLite, Oracle, SQL Server and dozens of other engines.

DB Browser for SQLite sqlitebrowser.org

A free open source GUI for creating, editing and querying SQLite database files with a spreadsheet like interface.

DB Fiddle db-fiddle.com

A free browser based SQL sandbox for writing, running and sharing SQL snippets with no install required.

SQL Fiddle sqlfiddle.com

A free, ad free online SQL playground supporting multiple database engines for quick testing and learning.

pgAdmin pgadmin.org

The official free PostgreSQL management and query tool, available as a desktop app or browser based interface.

Aiven PostgreSQL Playground aiven.io

A free, no signup online PostgreSQL sandbox for testing queries instantly.

DB Fiddle SQLite (dbfiddle.dev) dbfiddle.dev

A free WebAssembly powered SQLite playground that runs entirely in browser.

07

Free SQL Podcasts

3 RESOURCES
Data Engineering Podcast dataengineeringpodcast.com

A long running free podcast going behind the scenes on database tools, pipelines and data engineering practices relevant to SQL practitioners.

The Data Engineering Show open.spotify.com

A free podcast for data engineering and BI practitioners covering distributed SQL engines and real time pipelines.

Data Engineering Central Podcast podcasts.apple.com

A weekly free podcast discussing SQL Server, Oracle, Redshift, BigQuery and general data engineering news.

08

Free SQL Cheat Sheets and References

6 RESOURCES
SQL Cheat Sheet (sqltutorial.org) sqltutorial.org

A free downloadable PDF and PNG cheat sheet covering the most commonly used SQL statements.

SQL Cheat Sheet PDF (Dataquest) dataquest.io

A free quick reference PDF for common SQL operations and functions, good for printing and keeping at your desk.

SQL Cheat Sheet (GeeksforGeeks) geeksforgeeks.org

A free basic to advanced cheat sheet covering syntax across query types.

SQL Basics Cheat Sheet (LearnSQL.com) learnsql.com

A free two page cheat sheet showing syntax for all basic clauses with examples.

SQL Cheat Sheet (Zero To Mastery) zerotomastery.io

A free downloadable cheat sheet summarizing key SQL functions and database concepts.

Ultimate SQL Cheat Sheet (Hackr.io) hackr.io

A free, well organized summary of all major SQL concepts for quick lookup.

09

Free SQL Communities and Help

5 RESOURCES
r/SQL reddit.com

An active subreddit for asking SQL questions, sharing queries and getting peer feedback for free.

r/Database reddit.com

A subreddit focused on database design, administration and SQL and NoSQL discussion.

Stack Overflow (SQL tag) stackoverflow.com

The largest free Q&A archive for SQL problems, with millions of answered questions searchable by error or syntax.

The SQL Discord Server discord.com

A free Discord community with thousands of members dedicated to helping people learn SQL and troubleshoot database questions.

DBeaver GitHub Discussions github.com

A free community forum for troubleshooting the DBeaver tool and general SQL and database workflow questions.

10

Free SQL Project Ideas and Real-World Practice

6 RESOURCES
SQL Projects for Beginners to Advanced (Dataquest) dataquest.io

A free guide listing concrete beginner to advanced SQL project ideas like library and inventory management systems.

10 Portfolio-Ready SQL Projects (DataCamp) datacamp.com

A free article listing real project ideas suited to building a portfolio, from customer analysis to inventory tracking.

Chinook Sample Database github.com

A free, realistic sample digital media store database with artists, albums, invoices and customers, available for SQL Server, MySQL, Postgres and SQLite.

Northwind Sample Database github.com

Microsoft's classic free sample order and inventory database, one of the best known beginner practice datasets for joins and reporting.

Kaggle SQL-tagged Datasets kaggle.com

Free public datasets tagged for SQL practice, including ready made relational sample databases for beginners.

SQL Practice Dataset 1 (Easy) Queries (Kaggle) kaggle.com

A free beginner friendly relational dataset with multiple tables designed specifically for learning to query.