From what a database actually is to designing schemas and writing real SQL queries with confidence.
Each session is one hour with the AI tutor and uses one credit. Sign in to start.
The same three rules in every session, from the first line of code to the last.
You write all of the code. The tutor reacts to what you actually typed, line by line.
A ladder from a light nudge to the solution, and only after you have made a real attempt.
Your code runs for real. The tutor reads what the machine showed, and trusts it.
Where the other paths begin.
Why SQLite says misuse of aggregate COUNT(), why PostgreSQL says a column must appear in the GROUP BY clause, why SQLite sometimes gives a wrong answer with no error at all, and how WHERE and HAVING differ.
Why SQLite says "no such column", how single quotes fix the usual cause, the four other causes (a typo, another table, an alias, an old table) and the errors that look alike. With a table you can run.
What students ask before they start Databases & SQL Fundamentals.
Not for this course. The editor in the page runs your code next to the chat. If you prefer, you can use DB Browser for SQLite on your own computer.
The tutor gives a ladder of hints, from a light nudge to the solution, and only after you have made a real attempt.
Yes. In the editor in the page, your project is saved on the server for this course, continues in your next session on any device, and downloads as a .zip.
Yes. When you have finished every session, you get the Databases & SQL certificate of completion with your name: a link anyone can check, one-click LinkedIn and a PDF.
No. This course starts from zero. Take the sessions in order: each one builds on the one before.
Twenty minutes with the tutor, right in your browser. No card, nothing to install.
Start the free trial