Levich Academy

Learn one thing properly,
instead of five things badly.

We build one course at a time and finish it before starting the next. Every answer you write gets checked against the real thing, so you always know where you stand. Free, and there is nothing to install.

Start SQL Day by Day

48 days · 241 problems · free, forever

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SQL Day by Day

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From SELECT to reading a query plan

Every answer runs against a real Postgres in your browser and gets checked. Built for the interview you are going to sit, and the job after it.

48 days · 241 problems · free

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How we do it

One at a timeWe finish a course before starting the next. It is slower to launch and much better to learn from.
You do the workNo videos to nod along to. You write real answers, they get checked, and you find out immediately.
Free, and quietNo card, no ads, no emails. Sign in only so your progress follows you.

SQL is the only course we have finished. More are coming, and they will only show up here when they are as done as this one.

Levich Academy · levich.co

Learn one thing properly,instead of five things badly.

Open now

SQL Day by Day

How we do it

Learn one thing properly,
instead of five things badly.