SQL Querying for Beginners: PostgreSQL, MySQL, and SQL Server

Databases power almost every modern application, and knowing how to communicate with them is a foundational skill for any tech career. SQL is the universal language used to store, retrieve, and manipulate this valuable data. In this text-based course, you will transition from an absolute beginner to a confident database query writer. You will learn the core principles of relational databases and write standard SQL that works across major systems, including PostgreSQL, MySQL, and SQL Server, while exploring the unique features and modern capabilities of each platform. What you'll learn: - Understand fundamental database concepts, relational structures, and SQL syntax - Retrieve and filter specific data using SELECT statements, WHERE clauses, and sorting - Modify database records using INSERT, UPDATE, and DELETE operations - Combine data from multiple tables using INNER, LEFT, and RIGHT JOINs - Create and structure your own databases, tables, and views - Query modern semi-structured JSON data alongside traditional relational tables The course starts with essential database terminology and core design principles, then guides you step-by-step through reading and writing increasingly complex queries and managing database structures. This course is designed entirely for beginners with no prior programming or database experience. Start reading today and unlock the power of database querying.