Practical SQL for Data Analysis with PostgreSQL & ClickHouse

Ready to unlock the power of data? SQL (Structured Query Language) is the essential skill for anyone working in data analysis, data science, or software development. This course provides a practical, hands-on path to mastering this fundamental language. You will go from writing your first simple query to constructing complex analytical statements. By working with both PostgreSQL, a leading relational database, and ClickHouse, a powerful columnar database, you'll gain a versatile skill set applicable to a wide range of data-driven roles. What you'll learn: - Learn the fundamentals of SQL syntax, including SELECT, WHERE, GROUP BY, and ORDER BY. - Master different types of JOINs to effectively combine data from multiple tables. - Write sophisticated subqueries and Common Table Expressions (CTEs) to handle complex logic. - Apply powerful window functions to perform advanced calculations like rankings and running totals. - Understand the core differences and use cases for transactional (PostgreSQL) and analytical (ClickHouse) databases. - Practice fundamental query optimization techniques to ensure your code runs efficiently. - Build a solid foundation for a career in data analysis, data engineering, or business intelligence. The course starts with essential database terminology and basic query structure before moving on to practical exercises. You'll apply your knowledge by writing queries that solve real-world analytical problems. This course is designed for complete beginners. No prior experience with databases or programming is required to get started. Begin your journey to becoming proficient in SQL today.