Building Blocks To A Successful Career In Data Science
A community-driven platform for data scientists with exercises to help prepare you for your next interview or simply improve your analytical skills
With over 1000+ data science questions covering SQL and python, statistics, probability, modeling, product, and business cases from real companies, and the ability to work on our full-fledged coding platform, we provide the tools required to help data scientists improve their skillset, whether it's to prepare for an upcoming coding interview or learn advanced technical skills for your job.
Explore questionsPractice with over 1000 exercises from real companies aligned to your industry
We believe that practice makes perfect and to be a good data scientist, you need to get ahead of the curve and practice with as many real-word problems as possible.
Become a complete data scientist and analyst with our collection of real interview questions and practice problems taken from top companies in industry
Explore questionsResources to help you improve your data science skills
Work with popular data science languages like python and SQL to solve our coding questions
Compare your solution with others and learn multiple new approaches
Master advanced data science concepts for your career
Start off with any of these modules and practice with our repository of over 1000 exercises taken from real companies
SQL Clauses & Python Libraries
Learn popular data science languages and libraries like pandas and numpy for python
Comparison & Logical Operators
Learn to filter your data using and create subarrays using SQL and python operators
Aggregation Functions
Perform math operations using COUNT, SUM, AVG, GROUP BY, DISTINCT
Dealing With Data Types & Dates
Learn how to deal with dates, integers, floats, strings
Joining and Merging Multiple Datasets
INNER, LEFT, RIGHT, OUTER, SELF JOINS, JOINS and Merges with operators, JOINs with multiple keys to merge multiple datasets for both SQL and python
Window Functions, Rank Dense
Learn advanced sorting functions to perform calculations across a set of data rows that are somehow related to the current row
Writing Complex Code
Complex code like subqueries in SQL or masks in Python are tools for performing operations in multiple steps
Data Wrangling with SQL and python
Achieve mastery by learning to programmatically transforming data into a format that makes it easier to work with, like modifying all of the values in a given column in a certain way, or merging multiple columns together
Our users have invested in themselves to achieve their dreams
StrataScratch helped me get much better at SQL. I was faster and produced better quality analyses at work and got promoted!
I was looking for a simple, easy to use interface where I could practice SQL interview questions. The best part of StrataScratch is that you just need to sign up and you have access to various datasets and questions with a user friendly interface. I wouldn't feel so confident tackling SQL questions during an interview without StrataScratch.
Love the practice problems and solutions. They're so much to do on the platform that you'll get better over time. I felt so much more confident at work at at interviews because I had a lot of practice with StrataScratch
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