Best Free SQL Courses [2026]

The best free SQL courses in 2026, ranked and reviewed by what they cover, where they stop, and who they suit, plus a quick way to pick the right one.

Per Harald Borgen

Per Harald Borgen

— 9 min read
Best Free SQL Courses [2026]

Most programming skills have a shelf life. SQL does not. It has stayed in the top handful of developer tools for four decades, and in 2025 it was still used by 59% of developers, the fourth most-used language behind JavaScript, HTML/CSS, and Python (Stack Overflow 2025 Developer Survey). Relational databases hold the top four spots on the DB-Engines ranking, and the first non-relational system does not appear until fifth.

Here is the good news and the catch in one breath. You can learn all of it for free. The catch is that "free SQL course" returns a mess: tutorials that have not been updated since 2018, samplers that drop you at the certificate paywall, and courses that only run inside one cloud warehouse. The skill is free; finding the version of it worth your weekend is the work.

This guide ranks the genuinely free SQL courses worth your time in 2026. Each entry says what it covers, where it stops, and who it suits, followed by a quick way to choose and a note on what to learn next.

Are Free SQL Courses Worth It in 2026?

Yes. SQL fundamentals are fully learnable for free, and for most beginners a free interactive course covers everything needed to query real databases at work.

The reason is that SQL's core barely moves. SELECT, WHERE, JOIN, GROUP BY, and subqueries have been standardized since the language was formalized by ANSI and ISO (ISO/IEC 9075). What you learn in a free course in 2026 is the same SQL you will write in a job in 2030. Paid courses mostly add niche depth (warehouse-specific tuning, advanced analytics) that beginners do not need yet.

The skill pays even when the course does not. Lightcast counted 217,968 unique job postings mentioning SQL in a single month, with a median advertised salary of $90,000, spread across software engineering, data analysis, and business roles. There is no career reason to gate yourself behind a paywall to acquire it.

There is one honest caveat, and it is about practice, not price:

Free SQL courses rarely fail on content. They fail on practice. The ones worth your time let you run queries, not just watch someone else run them.

That distinction is what separates the list below.

The Best Free SQL Courses in 2026

These are the free SQL courses worth starting with, ordered roughly from most hands-on to most academic. Read the table for the shape of the field, then the entries for what a table cannot hold.

Course Cost Format Certificate Covers through Best for
Scrimba Learn SQL Free Interactive scrims Yes (free) JOINs, subqueries, CASE Hands-on interactive learners
Khan Academy Intro to SQL Free Video + in-browser No JOINs, modifying data Absolute beginners, zero setup
Kaggle Intro to SQL Free Notebook + BigQuery Yes (free) JOINs (+ Advanced SQL for windows) The data-analyst track
SQLBolt Free Interactive lessons No JOINs, aggregates Quick zero-setup drills
Codecademy Learn SQL Free tier Interactive Pro only Core lessons (projects need Pro) Sampling guided exercises
Mode / ThoughtSpot SQL Tutorial Free Browser tutorial No Basic to analytics queries Analytics-flavored SQL
Stanford Databases (edX audit) Free to audit Video + exercises Paid cert Relational theory and SQL University-level depth

Scrimba Learn SQL: Best for Interactive, Hands-On Practice

Scrimba's Learn SQL is free, runs 3.8 hours, and is taught by Gregor Thomson across 61 lessons in three modules: Fundamentals, Creating and Joining Tables, and Advanced Logic and Conditions. It covers SELECT, WHERE, sorting and grouping, INSERT/UPDATE/DELETE, table creation, JOINs, ANY/ALL/EXISTS subqueries, and CASE expressions, and it ends with a free completion certificate you can add to LinkedIn.

What sets it apart is the format. Scrimba uses scrims, interactive screencasts where you pause the instructor at any point and edit their code directly in the browser, running real queries against real data. That answers the one complaint that sinks most free courses, the one learners phrase as "I watched the whole thing and still can't write a query myself." Here, watching and doing happen in the same window.

The honest limit: this is a focused beginner course, not a deep dive into vendor-specific features, indexing strategy, or query optimization. Treat it as your interactive first pass, and reach for academic or warehouse-specific material later if your role demands it.

Khan Academy Intro to SQL: Best for Absolute Beginners

Khan Academy's Intro to SQL is completely free, needs no account, and runs entirely in the browser. It moves from creating tables and basic queries through joins and database modification (UPDATE, DELETE, ALTER, DROP), with 13 interactive challenges along the way, at a gentle pace built for someone who has never touched a database.

It is the softest on-ramp on this list. The trade-off is scope: there is no certificate, and it does not reach the deeper analytical features (window functions, query tuning) that a data role eventually needs. Plan to graduate to something deeper once the basics click.

Kaggle Intro to SQL: Best Free Course with a Certificate for Data Work

Kaggle's Intro to SQL is free, hands-on, and taught against Google BigQuery using real datasets, with a free completion certificate at the end. For anyone aiming at a data-analyst role, it doubles as a foot in the door to Kaggle's wider data-science community. Follow it with Kaggle's Advanced SQL for window functions and nested data.

The catch is the environment. The course is tied to BigQuery's dialect and a notebook workflow, so it is a slightly awkward fit if your target stack is plain PostgreSQL or MySQL. The transferable syntax still carries over.

SQLBolt: Best for Quick, Zero-Setup Drills

SQLBolt is free, interactive, and needs no signup. Its 18 lessons walk from SELECT through JOINs and aggregates, and the whole thing fits in an afternoon. As a fast refresher or a way to drill query syntax, it is hard to beat.

Know what you are getting, though. SQLBolt has been frozen since around 2018, so there are no window functions, no CTEs, and no modern dialect coverage. Use it as a supplement, not a primary course.

Codecademy Learn SQL: Best Free Sampler for Guided Exercises

Codecademy's Learn SQL puts its core interactive lessons in the free tier, which is enough to get a feel for the platform's guided, instant-feedback style. The projects, quizzes, and certificate, the parts that turn a course into a credential, sit behind Codecademy Pro at roughly $19.99 a month on the annual plan or $39.99 month to month.

So the free tier is a sampler, not a complete path. It is a fine way to test whether you like guided exercises before deciding where to invest.

Mode / ThoughtSpot SQL Tutorial: Best for Analytics-Flavored SQL

The SQL Tutorial now hosted by ThoughtSpot, originally built by Mode, is a free browser tutorial that runs from beginner syntax through analyst-style queries on real data. It leans toward the questions a data analyst actually asks, which makes it a useful complement to a more general course.

It is a written tutorial rather than a guided, graded course, and there is no certificate. Good for context and reference; less so as your only structured path.

Stanford Databases (edX): Best for University-Level Depth

Stanford's Databases: relational databases and SQL is free to audit and goes deeper into relational theory than any bootcamp-style option here. If you want to understand why a query planner behaves the way it does, this is where to go. The verified certificate is the only paid part.

The trade-off is obvious from the description: it is academic and dense, and overkill if you mainly want to query a table by Friday. Save it for when curiosity outpaces the deadline.

How to Choose a Free SQL Course

The right free SQL course depends less on rankings than on how you learn and what you are aiming at. Match yourself to one of these and start there:

Whatever you pick, a good free SQL course should get you comfortable with all of the following. If a course skips most of them, it is an intro, not a course:

  1. SELECT, WHERE, and ORDER BY
  2. Aggregate functions and GROUP BY
  3. INSERT, UPDATE, and DELETE
  4. Creating tables and joining them (INNER JOIN, LEFT JOIN)
  5. Subqueries and CASE expressions
  6. Running queries against real data, not just reading slides about them

These courses also pair well. A common free stack is Scrimba for the interactive intro, then Kaggle's Advanced SQL for window functions, then Stanford for the theory underneath it all.

What to Learn After a Free SQL Course

Finishing a free SQL course is the start, not the finish line. The fastest way to make the skill stick is to point it at real data: build a small report or dashboard that runs actual queries, and put it where a recruiter can see it. A query you wrote against your own dataset beats a certificate on its own.

From there, the path forks by goal. Aiming at backend engineering means pairing SQL with a server runtime and APIs. Aiming at data analysis means leaning into aggregation, window functions, and a BI tool. Either way, Git is the next foundational skill to pick up if you have not already.

For learners who want a structured route from SQL into a job, Scrimba's Pro plans continue where the free course stops. SQL appears as a module inside both the Backend Developer Path and the Fullstack Developer Path, alongside everything those roles require. Pro costs $24.50 a month on the annual plan ($294 a year) or $49 month to month, with regional and student discounts available. The free Learn SQL course is the place to start; the paths are there only if you want to keep going.

If you would rather follow the broader roadmap first, our guide on how to learn SQL lays out the sequence, and Best SQL Courses for Beginners covers the paid options alongside the free ones.

Frequently Asked Questions

Can you learn SQL for free?

Yes. The fundamentals are fully learnable at no cost. Free interactive courses like Scrimba's Learn SQL, plus Khan Academy and Kaggle, cover everything most beginners need to query real databases. Paid courses mainly add niche depth that beginners can postpone until a role actually requires it.

What is the best free SQL course in 2026?

It depends on how you learn. For interactive practice with a free certificate, Scrimba's Learn SQL is the strongest pick. For absolute beginners who want the gentlest start, Khan Academy. For a data-role certificate against real datasets, Kaggle's Intro to SQL. Each is genuinely free, not free-until-the-certificate.

Are free SQL courses good enough to get a job?

For the SQL part, usually yes. Employers test whether you can write JOINs and aggregations, not where you learned them. Pair a free SQL course with a project that queries real data, and you have something concrete to show in an interview, which counts for more than the course's brand name.

Do any free SQL courses include a certificate?

Yes. Scrimba and Kaggle both include free completion certificates. Khan Academy and SQLBolt do not offer one. Codecademy's certificate requires its paid Pro plan. If a free certificate matters to you, Scrimba and Kaggle are the two to prioritize.

How long does it take to learn SQL for free?

Basic queries take a weekend. Job-ready comfort with JOINs, subqueries, and grouping takes two to four weeks of consistent practice. A short interactive course like Scrimba's 3.8-hour Learn SQL typically expands to 10 to 15 hours once you factor in writing your own queries rather than just watching.

Key Takeaways

  • SQL is the fourth most-used programming language and is ANSI/ISO-standardized, so what you learn free today is the same SQL you will write years from now.
  • The fundamentals are fully free: a free interactive course covers everything most beginners need to query real databases at work.
  • The best free options split by learning style: Scrimba for interactive practice with a certificate, Khan Academy for absolute beginners, Kaggle for data work plus a certificate, and Stanford on edX for academic depth.
  • Watch for the two free-SQL traps: tutorials frozen years ago with no modern features, and "free" courses that paywall the projects and certificate.
  • A good free SQL course must let you run queries, not just watch them, and should cover JOINs, subqueries, grouping, and CASE expressions.
  • The skill pays regardless of where you learn it: SQL appears in over 200,000 job postings a month at a median advertised salary near $90,000.

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