Скачать или смотреть SQL Decoded: Mastering the Magic of ORDER BY, GROUP BY & HAVING in Just One Tutorial

Welcome to my comprehensive SQL tutorial! In this video, I'll demystify three essential SQL concepts: ORDER BY, GROUP BY, and the HAVING clause. Whether you're a beginner or looking to refresh your SQL skills, this tutorial has got you covered.

Here's what you'll learn:
1. ORDER BY: Discover how to sort your query results in ascending or descending order based on one or more columns. We'll also cover the use of NULLs and case-sensitive sorting.

2. GROUP BY: Dive into the power of grouping your data. Learn how to aggregate information and create summary statistics using GROUP BY. We'll explore examples with COUNT, SUM, AVG, and other aggregate functions.

3. HAVING Clause: Uncover the HAVING clause's role in filtering grouped data. See how it differs from the WHERE clause and when to use it effectively to refine your query results.

Throughout the video, we'll provide clear examples and practical scenarios to ensure you grasp these SQL concepts thoroughly. By the end, you'll have the knowledge and confidence to use ORDER BY, GROUP BY, and HAVING in your own SQL queries.

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