PostgreSQL Database Design and SQL Essentials

Every modern application relies on a solid data foundation, yet poorly structured databases lead to slow performance and messy code. Understanding how to design clean relational schemas and write precise queries is a fundamental skill for any developer or data enthusiast. This text-based course guides you through the core principles of database design using PostgreSQL. You will transition from understanding basic data concepts to structuring complex relational schemas, ensuring your data remains organized, consistent, and easy to query. What you'll learn: - Understand foundational database concepts, relational theory, and key terminology. - Design robust schemas using primary keys, foreign keys, and constraints like cascade deletes. - Model real-world relationships, including one-to-many and many-to-many structures. - Write essential SQL queries to insert, filter, sort, and join data. - Leverage modern PostgreSQL features, including semi-structured JSONB data and basic indexes for performance. You will begin by exploring core definitions and database history before moving into practical table creation and data modeling. Through written explanations and clear code examples, you will learn to write queries and manage relationships step-by-step. This course is designed for absolute beginners to database design and SQL, with no prior programming or database experience required. Start building a solid foundation in data modeling and SQL today.