The SQL interviews actually ask for.
Not the one taught in class.
Practise on the real cases data recruiters set, with an AI coach that reviews every query the way a senior would.
Why most people stay stuck
SQL is everywhere — marketing, finance, product, ops. Yet two realities sabotage the people who want to progress.
Without solid SQL, you are dependent.
Every team works with data. Those who cannot query it themselves carry a dependency that is invisible, expensive and frustrating.
- →Waiting on a data analyst for every extract, however simple.
- →Badly written queries — and decisions made on wrong numbers.
- →Opportunities missed for not being seen as “data-driven”.
- →Hours lost debugging joins and aggregations.
They teach you to play. Not to work.
Made-up datasets, exercises detached from reality: you finish the module — and stall at the first real business problem.
- →Artificial data with no bearing on your industry.
- →Quizzes that test memory, not skill.
- →No feedback on the performance or readability of your code.
- →“40 hours of lessons and still unable to write a report.”
There is another way to learn.
Start free. Your personalised SQL path is ready in under five minutes.
Try it freeNo card required
A platform built for real progress
No detached theory. No generic exercises. Every piece is designed to move you forward fast — and for good.
Your exercises, in your universe, at your level.
Every mission is generated by the AI from your industry and your level. You work on realistic schemas — orders, subscriptions, invoices — not on invented data.
Watch your level move with every mission
A skills radar updated on every submission. 13 SQL areas tracked individually. Your overall level rises as soon as your scores justify it.
10 levels. One timeline. One trajectory.
From Beginner to Expert, each level unlocks more demanding missions. Your timeline shows every mission passed — and makes the ground covered visible.
More than just “right” or “wrong”.
The AI reviews your query on three axes — correctness, writing quality, performance — and explains precisely what is off.
140+ concepts. Endlessly generated exercises.
Every concept comes with a sheet and practical exercises. The AI builds a new case each time, in your universe, without ever repeating itself.
No card required
What you are going to master
13 SQL areas covered — from the simple query to advanced optimisation.
No card required
Choose your playing field
Each universe has its own schemas, data and scenarios. Work on cases that mean something to you.
E-commerce
Orders, products, customers, returns. Analyse sales and buying behaviour.
SaaS · Tech product
Users, subscriptions, events. Measure retention, MRR and product growth.
Marketing · Growth
Campaigns, leads, conversions. Optimise your funnels and measure acquisition.
Finance
Invoices, payments, revenue. Build financial reports that are reliable and auditable.
HR · Ops
Employees, teams, processes. Analyse performance and how the organisation is structured.
Learning
Discover SQL step by step on teaching data — ideal to start out or to change career.
No card required
A different approach
We rethought SQL learning to make it addictive, effective and directly applicable.
Adaptive levels
Your level moves automatically with your results, from Beginner to Expert across 10 tiers.
AI mentor
A personal assistant that reads your query, points out your mistakes and guides you to the answer.
Real cases
No more abstract theory. Work on genuine company data from your own industry.
Skill analysis
See your strengths and weak spots across 13 SQL areas on your dashboard.
Industry universes
Pick your sector: e-commerce, SaaS, marketing, finance or HR/Ops.
AI diagnostic
An adaptive quiz assesses your SQL from sign-up to calibrate your path.
No card required
Data is everywhere. SQL too.
Whatever your job or your industry — if you work in a company, you are around data every day. Mastering SQL means taking back control.
They use SQL every day without knowing it
Across every industry
Whatever your role, your industry or your level today.
ModAi Lab adapts to you.
What they say
My grasp of joins was really shaky. Two weeks of missions in the e-commerce universe and I finally understand the difference between LEFT JOIN and INNER JOIN — and, above all, when to use which.
The AI feedback is remarkable. It does not just hand you the right answer, it explains why your query is suboptimal and how to improve it. Like having a mentor available around the clock.
What sold me was the SaaS universe. Every metric — MRR, churn, LTV — is a query I genuinely write at work. Concrete at last, not abstract exercises.
I am a financial controller. Nobody ever told me SQL would be useful to me. Today I pull my own data from our warehouse without depending on the BI team. An enormous time saver.
I had tried several MOOCs before. I always finished the modules without being able to write a real query on my own. Here, the finance universe scenario threw me straight in.
The concept of the day helped me most. Five minutes each morning on one precise idea, with an exercise behind it. In a month I closed every blind spot I had on window functions.
No card required
FAQ
Is the platform free?+
Yes, you can start free with no card. The trial lets you try the missions and the concept catalogue before choosing a plan.
I have never written SQL. Where do I start?+
At sign-up, an adaptive quiz detects your level (even if it is zero) and builds a path to fit. You will start with the fundamentals and move on from there.
What is the difference between a mission and a concept?+
A concept is a learning sheet on one precise piece of SQL (GROUP BY, INNER JOIN, and so on). A mission is a practical exercise generated by the AI inside your industry universe, drawing on several concepts at once.
Which SQL dialect is used?+
Exercises run on PostgreSQL — the most widespread standard in industry. The concepts also cover MySQL and BigQuery where they differ.
Can I change industry universe along the way?+
Yes, you can change your universe from your profile at any time. Your SQL progress is kept; only future exercises move to the new universe.
How does the AI feedback work?+
After each submission the AI reviews your query: result, readability, performance and good practice. It pinpoints the mistake or the thing to improve — and explains how to fix it.
Forge your SQL expertise today.
Your personalised path is ready in under five minutes.No card required.
Free trial · no commitment ·instant access