Скачать или смотреть How to use SQL COUNT(), AVG(), and SUM() functions? | SQL Tutorial For Beginners | Learn SQL

Welcome to our SQL tutorial for beginners! In this video, we explore three essential SQL aggregate functions: COUNT(), AVG(), and SUM(). These functions are crucial for performing calculations and obtaining aggregated results from database tables. Whether you're new to SQL or looking to expand your skills, this tutorial will guide you through the usage of COUNT(), AVG(), and SUM() functions effectively.

In this tutorial, you'll learn:
What the SQL COUNT(), AVG(), and SUM() functions are and their roles in data analysis.
The syntax of each function and how to use them to calculate counts, averages, and sums of data.
How to apply these functions to numeric data, dates, and strings.
Techniques for using COUNT(), AVG(), and SUM() with GROUP BY for aggregated queries.
Practical examples demonstrating the use of these functions in real-world scenarios.
Tips and best practices for optimizing queries using COUNT(), AVG(), and SUM() functions.

By the end of this video, you'll have a solid understanding of how to leverage the SQL COUNT(), AVG(), and SUM() functions to perform calculations and analyze data effectively, improving your SQL query skills.

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How to use SQL COUNT(), AVG(), and SUM() functions? | SQL Tutorial For Beginners | Learn SQL

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