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Data Cleaning with Power BI

Data Cleaning with Power BI

By : Frazer
5 (7)
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Data Cleaning with Power BI

Data Cleaning with Power BI

5 (7)
By: Frazer

Overview of this book

Microsoft Power BI offers a range of powerful data cleaning and preparation options through tools such as DAX, Power Query, and the M language. However, despite its user-friendly interface, mastering it can be challenging. Whether you're a seasoned analyst or a novice exploring the potential of Power BI, this comprehensive guide equips you with techniques to transform raw data into a reliable foundation for insightful analysis and visualization. This book serves as a comprehensive guide to data cleaning, starting with data quality, common data challenges, and best practices for handling data. You’ll learn how to import and clean data with Query Editor and transform data using the M query language. As you advance, you’ll explore Power BI’s data modeling capabilities for efficient cleaning and establishing relationships. Later chapters cover best practices for using Power Automate for data cleaning and task automation. Finally, you’ll discover how OpenAI and ChatGPT can make data cleaning in Power BI easier. By the end of the book, you will have a comprehensive understanding of data cleaning concepts, techniques, and how to use Power BI and its tools for effective data preparation.
Table of Contents (23 chapters)
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1
Part 1 – Introduction and Fundamentals
6
Part 2 – Data Import and Query Editor
11
Part 3 – Advanced Data Cleaning and Optimizations
16
Part 4 – Paginated Reports, Automations, and OpenAI

Understanding the Query Editor interface

In this section, we will explore the essential components and functionalities of the Power Query interface in Power BI, along with some common techniques and functions to help you clean data.

To access Query Editor, open Power BI Desktop and navigate to the Home tab on the ribbon. Click on the Transform data button to launch Query Editor.

Figure 6.1 – Locating the Transform data button in the Home tab

Figure 6.1 – Locating the Transform data button in the Home tab

Once inside Query Editor, you will notice the Power Query ribbon, which contains various groups of commands and tools to manage and transform your data, as shown in the following screenshot:

Figure 6.2 – Power Query ribbon with its important functions shown on the Home tab

Figure 6.2 – Power Query ribbon with its important functions shown on the Home tab

The Query Editor navigation pane is on the left-hand side of the window. It lists all the queries in the current report and provides options to navigate between queries, as shown in the following screenshot...

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