
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.

Mockaroo
DataConstruct
Data Creator
Datamade
Random Data
Generate and manage synthetic datasets easily with DUMMY DATABASE

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.
|
|
|
|
|---|---|---|
| Website | stratascratch.com | dummydatabase.com |
| Pricing | ||
| Platforms | — | |
| Company | — | Startup from Serbia · 1 - 9 employees · 2024 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of StrataScratch yet.
Dummy Database is built to solve a simple, yet annoying problem — generating realistic test datasets quickly, without writing scripts or juggling Excel files. It’s designed for: - Developers needing dummy databases for prototyping & testing. - Analysts and BI specialists preparing demo...
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
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Practice Writing SQL Queries on StrataScratch | How to Solve SQL Queries
More videos
No DUMMY DATABASE videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing StrataScratch and DUMMY DATABASE.
DUMMY DATABASE's answer:
A free, all-in-one data generation platform that builds everything from simple tables to full relational databases with advanced controls, unique event sequences, ERD visualization, built-in SQL querying, and multiple export formats — no limits, no paywalls.
DUMMY DATABASE's answer:
Unlike other data generators, DUMMY DATABASE gives you full relational database creation, unique event simulations, advanced control over every field, built-in SQL querying, and generous free limits — so you can go from idea to test-ready data without restrictions, subscriptions, or hidden fees
DUMMY DATABASE's answer:
DUMMY DATABASE's answer:
Began as a project for myself to be able to have custom datasets for testing purpose I've decided that it could be useful for wider audience and finalized it as a full-stack web project
DUMMY DATABASE's answer:
Python, Flask, HTML, CSS, Bootstrap, Redis, PostgreSQL, JavaScript
Share your experience with using StrataScratch and DUMMY DATABASE. 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 DUMMY DATABASE 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 DUMMY DATABASE since Aug 2025.
When comparing StrataScratch and DUMMY DATABASE, you can also consider the following products.

Practice and level up your development skills and prepare for technical interviews.
Compare LeetCode to StrataScratch or DUMMY DATABASE:
A realistic data generator to test your app
Compare Mockaroo to StrataScratch or DUMMY DATABASE:

Practice SQL Interview Questions & Data Science Interview Questions asked by FAANG.
Compare DataLemur to StrataScratch or DUMMY DATABASE:

We fake it till you make it!
Compare DataConstruct to StrataScratch or DUMMY DATABASE:

DataCamp is a massive open online course (MooC) platform that helps everyone from novices to experts hone their skills with data science.
Compare Datacamp to StrataScratch or DUMMY DATABASE:
Data generator that can create a table filled with pseudo-random content.
Compare Data Creator to StrataScratch or DUMMY DATABASE: