SQL Fundamentals: Query and Analyze Relational Data

In today's data-driven world, the ability to talk directly to databases is one of the most valuable skills you can build. SQL is the standard language used to explore, filter, and extract meaningful insights from massive stores of structured information. This text-based course takes you from absolute beginner to a confident data queryist. You will learn how to read database schemas, write structured queries, and transform raw tables into clear, actionable answers for business decisions or data science projects. What you'll learn: - Understand the core concepts of relational databases, tables, and schemas. - Write foundational queries to filter, sort, and aggregate raw data. - Combine data from multiple tables using inner, outer, and cross joins. - Apply window functions and built-in PostgreSQL functions for advanced analytical calculations. - Structure complex queries clearly using modern Common Table Expressions (CTEs) and clean formatting practices. - Analyze real-world datasets to solve practical business questions and build your data portfolio. The course begins with essential database definitions and basic syntax before guiding you step-by-step through advanced joining techniques, data aggregations, and analytical calculations. You will progress through clear written explanations and practical query-building scenarios designed to reinforce your understanding. This course is designed entirely for beginners with no prior programming or database experience who want to build a strong, practical foundation in data analysis. Start reading today to unlock the power of your data and level up your analytical skills.