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358 results
In this beginner-friendly SQL course, we start from zero and build real SQL thinking using DuckDB. In this first lesson, you'll learn: ...
11 views
11 days ago
This problem tests: Column-to-row transformation (UNPIVOT / UNION ALL) Joins and aggregation Interview-ready SQL thinking ...
182 views
2 weeks ago
![Why SQL is Essential for Data Analysis | Beginner Friendly SQL Course (2026) [SQL Basic - Episode 1]](/api/proxy/image?url=https%3A%2F%2Fi.ytimg.com%2Fvi%2FRC8dl0XqNII%2Fsddefault.jpg)
