Верный источник данных: Теория + Практика (Бонус: Power Query) | 7-ое Видео курса "Сводные Таблицы"

In this video, we will look at what the data source for pivot tables should be and what are “long” and “wide” tables. As a practical exercise, we will learn how to convert tables from wide (pivot/matrix) format to long (narrow/normalized) in an automated format using Power Query. Video files for repeating the presented actions: https://drive.google.com/drive/folder... Want to support my channel? You can do this using the “Sponsorship” function:    / @bilyalkhassenov