
LeetCode
DataLemur
Datacamp
HackerRank
Codecademy
PrepNPlaced
SkillVee
StrataScratch is a data science interview platform that has over 1000+ real interview questions from top tech companies like Facebook, Amazon, Google, and more.

DataLemur
SQL FOR ZOMBIES
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?
Based on our record, StrataScratch seems to be more popular. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | stratascratch.com | sqlcrab.com |
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In their own words, as submitted to SaaSHub.


No description of StrataScratch 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.


No features have been listed yet.
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of SQLCrab yet.
Walkthroughs and reviews on video.
Practice Writing SQL Queries on StrataScratch | How to Solve SQL Queries
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using StrataScratch and SQLCrab. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


StrataScratch offers free data science interview questions and continues to release interview questions when they come out from companies. This ensures that you are always practicing your data science skills on...
We have no reviews of SQLCrab yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


StrataScratch is focused on providing data analysis/science resources needed to land a job and resources for the first few years of your career. It has 600+ coding questions from real interviews where you can use SQL, python, or R. It... Source: over 3 years ago
I learned off of Mode Analytics SQL tutorial. It's free and I use it as a reference when I forget syntax. From there, my learning style is to grind on practical questions that I would get as a data analyst. So I would recommend... Source: over 3 years ago
There was a comment here about using Leetcode, Hackerrank, SQL fiddle, etc to keep learning SQL. However, if you're aim is to go into data analytics you need to go beyond learning syntax and understand edge cases and business context.... Source: over 3 years ago
Tracking SQLCrab since Sep 2026.
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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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