DataLemur
SQL Police Department
SqlInt
SQL Play
HackerRank
Codecademy
LeetCode
Entertaining way to learn SQL

DataLemur
SQL Teaching
Practice real SQL interview questions in your browser on a real Postgres engine. Free tutorial, concept cards, sandbox, and graded labs.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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SQL FOR ZOMBIES
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| Website | alexpineda.gumroad.com | sqlcrab.com |
| Pricing | — | |
| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of SQL FOR ZOMBIES yet.
SQLCrab is a place to train for SQL interviews. Learn the fundamentals with a step-by-step tutorial, lock in key ideas with concept cards, experiment in the sandbox, then test yourself with graded labs built around the questions employers actually ask. Real Postgres, Real practice. No setup, just...
What each product offers, as listed by its team.

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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using SQL FOR ZOMBIES and SQLCrab. For example, how are they different and which one is better?
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Practice SQL Interview Questions & Data Science Interview Questions asked by FAANG.
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Learn SQL while solving crimes! Climb the ranks of SQL PD.
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Get interview-ready with real SQL questions, story-driven puzzles, and case studies — all solvable right in your browser. Start practicing free today.
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HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
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