Kaggle Learn's Intro to SQL course is a free, hands-on introduction to SQL covering SELECT, WHERE, filtering, aggregation, and joining tables. All lessons run in Kaggle notebooks against real databases, so you write SQL from day one. After finishing, you can query databases and understand relational data. The course is practical and doesn't assume SQL knowledge. The main limitation: SQL is much bigger (window functions, CTEs, optimization), but this teaches the essentials. For deeper SQL, take CS50's SQL course or books like "SQL Performance Explained".
SQL is one of the most in-demand skills for data work, used by over 95% of data professionals (source: Stack Overflow and job market analysis).
About This Course
Kaggle Learn's 3-hour SQL micro-course using BigQuery. Covers SELECT, WHERE, GROUP BY, ORDER BY, JOINs, and writing efficient queries over large datasets. Notebook-based and free.
Course Details
Frequently Asked Questions
Is Kaggle's SQL course free?
Yes, completely free.
How long does it take?
About 3-4 hours of lessons. Most people finish in 1-2 weeks.
What database does it teach?
BigQuery, Google's data warehouse. The SQL you learn transfers to MySQL, PostgreSQL, etc.
After this, what database should I use?
Depends on your goal. PostgreSQL for web apps, BigQuery for data analysis, SQLite for learning.
Is this enough for data analysis work?
It's a foundation. Real data work also needs Python (pandas), visualization, and statistics.
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