SQL Queries: Mastering Joins and Single-Row Functions

Ready to take your SQL skills beyond simple SELECT statements? To extract meaningful insights from modern databases, you must know how to transform individual data points and connect information scattered across different tables. This text-based course guides you through the essential techniques of data manipulation and multi-table querying. You will learn to clean and format data on the fly, perform calculations, and write precise joins to merge datasets seamlessly. What you'll learn: - Apply single-row functions to manipulate text, numeric values, and dates directly within your queries. - Master table relationships and join types, including INNER, LEFT, RIGHT, and FULL OUTER joins. - Handle missing or null values effectively using modern SQL functions like COALESCE and NULLIF. - Write clean, readable queries using modern formatting conventions and Common Table Expressions (CTEs). - Understand how database engines process multi-table queries to write more efficient SQL code. You will start with core terminology, foundational definitions of table relationships, and basic function syntax. Through clear written explanations and realistic schema examples, you will progress to building complex queries that solve real-world data challenges. This course is perfect for beginners who know basic SQL commands and want to expand their querying capabilities. Start reading today to unlock the full potential of relational database querying.