https://www.freecodecamp.org/news/learn-sql-for-analytics/
This video course is great for those who are new to SQL and programming. Familiarity with spreadsheets like Microsoft Excel or Google Sheets can be helpful, but it's not required. The course is divided into two main sections: theory and practice, ensuring a balanced approach to learning.
Theory: This part covers the fundamentals of SQL through concise explanations and practical demonstrations. The lessons are conducted using BigQuery and include illustrative drawings and spreadsheet examples to simplify complex concepts.
Practice: Here, you'll apply what you've learned by solving real exercises. Each exercise is thoroughly explained in the video tutorials, where Vlad demonstrates solutions using PostgreSQL.