Next Steps in SQL: Intermediate Queries

Are you comfortable with basic SELECT statements but find yourself stuck when faced with more complex data challenges? To answer nuanced questions and generate meaningful reports, you need to expand your SQL toolkit. This course will guide you beyond fundamental queries, teaching you how to write the sophisticated, multi-step SQL needed for serious data analysis. You'll learn to combine data from various tables, perform complex calculations, and structure your queries like a professional, turning raw data into actionable insights. What you'll learn: - Master advanced JOIN operations, including LEFT, RIGHT, and FULL OUTER, to integrate data from multiple tables. - Group and summarize data with aggregate functions and filter those results using the HAVING clause. - Write cleaner and more readable multi-step logic using Common Table Expressions (CTEs). - Apply powerful window functions to perform calculations like running totals, rankings, and moving averages. - Understand and effectively manage NULL values within your datasets and query results. - Practice using subqueries to solve complex problems that require nested filtering and logic. The curriculum builds logically on foundational knowledge, introducing each new concept with clear explanations and practical written exercises to solidify your understanding. This course is for learners who already know the basics of SQL (`SELECT`, `FROM`, `WHERE`) and are ready to tackle more advanced topics. No other prerequisites are required. Start writing more powerful SQL queries today.