Relational Database Design and Advanced SQL Querying

Every robust application relies on a well-structured database, yet poor design choices early on can lead to slow queries and data corruption. Understanding how to model relationships and write efficient queries is an essential skill for any aspiring developer or data professional. This text-based course guides you from database concepts to becoming a confident designer and querying practitioner. You will learn how to translate real-world requirements into clean database schemas, enforce data integrity, and retrieve complex datasets with precision. What you'll learn: Understand core relational database terminology, tables, keys, and schemas; Design efficient databases using entity-relationship modeling and normalization techniques; Construct and modify database structures using Data Definition Language and integrity constraints; Write advanced SQL queries using complex joins, subqueries, and Common Table Expressions; Implement modern database features including window functions and JSON data handling; Optimize query performance with indexing strategies and execution analysis. The course begins with foundational database concepts and design theory before progressing to hands-on schema creation. You will then transition into writing advanced queries, learning how to manipulate and analyze data effectively through step-by-step written explanations and practical code examples. This course is designed for beginners who want to build a strong foundation in database design and SQL, with no prior database experience required. Start reading today to master the art of structuring and querying relational databases.