txt SQL: Master SQL from Fundamentals to Advanced
por RKB Publications
Descrição do livro
Master SQL from the fundamentals to advanced querying, analysis, and real-world problem solving. SQL is one of the most important skills in data, analytics, software engineering, and modern business intelligence. But learning SQL is not just about memorizing commands. You need to understand how queries work, how tables relate to each other, how to write efficient solutions, and how to think through real data problems. This book takes you from the foundations of SQL to advanced concepts in a structured, practical way. Inside, you’ll learn: • SQL fundamentals and relational database concepts Whether you're learning SQL for the first time, preparing for interviews, working in data analytics, or looking to strengthen your existing skills, this book is designed to be both a learning guide and a practical reference. The goal is simple: help you understand SQL deeply enough to write better queries, solve real problems, and work confidently with data.
• Filtering, sorting, grouping, and aggregations
• Joins and subqueries
• Common Table Expressions (CTEs)
• Window functions and advanced analytical queries
• Conditional logic and date/time operations
• Set operations and advanced query techniques
• Data cleaning and transformation with SQL
• Working with real-world analytical problems
• Query optimization and performance considerations
• Best practices, common mistakes, and important SQL gotchas
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