SQL and PostgreSQL Essentials: Querying, Indexing, and Analytics

Understanding databases is an essential skill for software developers, data analysts, and tech professionals. This course guides you through structured text-based lessons from foundational database concepts to core relational techniques using PostgreSQL. You will build a clear understanding of database design, query construction, and performance fundamentals needed to work confidently with real-world data. What you'll learn: - Understand core relational database concepts, table relationships, and essential syntax - Write efficient SQL queries using filtering, joins, aggregations, and subqueries - Master advanced analytical techniques including CTEs and window functions - Work with semi-structured data using PostgreSQL JSONB capabilities - Optimize query performance using indexes and execution plan analysis - Manage database consistency using transactions, views, and schema constraints. The course begins with fundamental terminology and relational database concepts before progressing to advanced query techniques and database optimization. You will learn by reading practical text lessons, analyzing code snippets, and completing written practice exercises. Designed specifically for beginners, this course requires no prior programming or database experience. Take your first step toward database proficiency today.