Data Science Educational Resources
StrataScratch is a data science educational platform with over 1,000+ real interview questions from your favorite companies.
Latest Blog Posts
All articles
SQL Execution Order Explained With Real Query Examples
SQL execution order decides how queries actually run. Learn why FROM comes first, how aliases fail in WHERE, and when to use HAVING, with real examples.
Sara Nobrega -
You’re Not Unemployed. You’re Unemployable. (Here’s Why.)
Five reasons your data science job search isn't working, and what to fix before sending another application.
Tihomir Babic -
Understanding NULL Semantics in SQL
NULL in SQL is often a source of confusion, leading to bug propagation. Learning how NULL behaves in different scenarios to keep your query outputs trustworthy.
Tihomir Babic -
INTERSECT vs UNION in SQL for Reasoning About Overlapping Data
INTERSECT vs UNION in SQL: choose the wrong set operator, and the query returns a plausible but incorrect result, with no error and no warning to tell you so.
Sara Nobrega -
Career
All Career articles
You’re Not Unemployed. You’re Unemployable. (Here’s Why.)
Five reasons your data science job search isn't working, and what to fix before sending another application.
Tihomir Babic -
You Don’t Need to Be a Math Genius for Data Science
Learn the truth about data science interviews and how deep you actually need to go into maths.
Tihomir Babic -
Interviews
All Interviews articles
SQL Execution Order Explained With Real Query Examples
SQL execution order decides how queries actually run. Learn why FROM comes first, how aliases fail in WHERE, and when to use HAVING, with real examples.
Sara Nobrega -
Understanding NULL Semantics in SQL
NULL in SQL is often a source of confusion, leading to bug propagation. Learning how NULL behaves in different scenarios to keep your query outputs trustworthy.
Tihomir Babic -
Guides
All Guides articlesSQL Execution Order Explained With Real Query Examples
SQL execution order decides how queries actually run. Learn why FROM comes first, how aliases fail in WHERE, and when to use HAVING, with real examples.
Sara Nobrega -
You’re Not Unemployed. You’re Unemployable. (Here’s Why.)
Five reasons your data science job search isn't working, and what to fix before sending another application.
Tihomir Babic -
Companies
All Companies articles
What Does It Take to Be a Data Engineer at Google
Journeying through Skills, Perks, and Application Insights for Aspiring Google Data Engineers
Nathan Rosidi -
Microsoft SQL Interview Questions
We'll discuss one of the interesting Microsoft SQL interview questions to help prepare you for applying for a role as a Microsoft data scientist.
Nathan Rosidi -
