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Angleščina
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Are you preparing for a career in data analytics, business intelligence, or database management? Do you want a practical, job-ready SQL guide that cuts through the theory and gives you exactly what you need?
This book is your hands-on crash course, designed to help you master SQL quickly and confidently.
Inside, you'll find:
✔️ 100 essential SQL queries every analyst should know
✔️ Step-by-step explanations with query outputs and real-world use cases
✔️ 10 structured sections covering Basics, Joins, Aggregations, Window Functions, Optimization, and more
✔️ Practical scenarios such as Top N Customers, Monthly Sales Trends, and Year-over-Year Growth
Whether you are a student preparing for interviews, a professional analyst, or someone looking to boost career opportunities, this book will help you analyze data smarter and faster.
What you will learn:
- How to write clean, efficient SQL queries
- The most important functions for strings, dates, and numbers
- How to optimize queries for performance
- How SQL is applied in real business problems
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