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This book takes you from zero database experience to professional-level SQL mastery through a carefully structured learning path. Using consistent real-world examples from two sample databases that run throughout the entire book, you will learn relational database fundamentals, core querying techniques, advanced analytical patterns, database programming, performance optimization, and production best practices. Every concept is explained with working code, practical scenarios, and attention to how SQL behaves across major database systems including PostgreSQL, MySQL, SQL Server, Oracle, and SQLite. This is both a structured learning resource and a long-term professional reference.

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Kick off your book project, get started with GhostAI, get better at marketing, or spend the day doing all three! Free live workshops on Zoom. Saturday, June 27, 2026.

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