Скачать или смотреть Mastering Window Functions in SQL for Data Analysis: 1 Hour Mini-Course

Unlock the power of Window Functions in SQL with this comprehensive 1-hour mini-course! Designed for current and aspiring Data Analysts, this tutorial will elevate your data analysis skills to the next level.

In this video, we'll dive deep into the world of SQL Window Functions, covering essential concepts and practical applications, including:

The OVER Function: Learn how to use the OVER function to perform calculations across a set of table rows.

PARTITION BY Clause: Understand how to divide your result set into partitions to perform calculations on each partition.

ROW_NUMBER: Discover how to assign a unique sequential integer to rows within a partition.

RANK & DENSE_RANK Functions: Explore these functions to rank items in your data set with and without gaps.

LEAD & LAG Functions: Get to grips with these functions to access data from preceding or succeeding rows.

Subqueries & Window Functions: Learn how to combine subqueries with Window Functions for more advanced data analysis.

By the end of this video, you'll have a solid understanding of window functions and how to apply them effectively in your data analysis projects.

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Timestamps:
0:00 - Introduction
1:40 - Introducing Window Functions with the OVER Function
11:11 - The PARTITION BY Clause
16:56 - The ROW_NUMBER Function
27:05 - The RANK & DENSE_RANK Functions
34:14 - The LEAD & LAG Functions
48:19 - Combining Subqueries with Window Functions