SQL Querying and Data Analysis for Beginners

Relational databases store the world's most critical business information, making SQL an essential skill for analyzing data and solving real business problems. This comprehensive text-based course takes you from foundational database concepts to writing multi-step analytical queries using practical sales and retail data. You will start by mastering key database terminology, table relationships, and standard data types. As you progress through clear written explanations and syntax examples, you will learn to retrieve, filter, aggregate, and transform complex datasets with confidence. What you'll learn: • Understand core relational database concepts, primary keys, and data types. • Write foundational SQL queries using SELECT, WHERE, GROUP BY, and HAVING clauses. • Combine data across multiple tables using INNER, LEFT, RIGHT, and FULL JOINs. • Apply modern analytical tools like Common Table Expressions (CTEs) and subqueries. • Utilize window functions to compute rankings, running totals, and moving averages. • Analyze practical retail sales datasets to extract meaningful business insights. The course begins with essential database definitions before systematically advancing toward complex multi-table queries and analytical functions. Designed for complete beginners, no prior coding or database experience is required. Start reading today to build practical SQL fluency.