Book Image

Learn Power Query

By : Linda Foulkes, Warren Sparrow
Book Image

Learn Power Query

By: Linda Foulkes, Warren Sparrow

Overview of this book

<p>Power Query is a data connection technology that allows you to connect, combine, and refine data from multiple sources to meet your business analysis requirements. With this Power Query book, you’ll be empowered to work with a variety of data sources to create interactive reports and dashboards using Excel and Power BI. </p><p>You’ll start by learning how to access Power Query across different versions of Excel and install the Power BI engine. After you've explored Power Pivot, you’ll see why Excel users find it challenging to clean data in Power Pivot and learn how Power Query can help to tackle the problem. The book will show you how to transform data using the Query Editor and write functions in Power Query. A dedicated section will focus on functions such as IF, Index, and Modulo, and creating parameters to alter query paths in a table. You’ll also work with dashboards, get to grips with multi-dimensional reporting, and create automated reports. As you advance, you'll cover the M formula language in Power Query, delve into the basic M syntax, and write the M query language with the help of examples such as loading all library functions offline in Excel and Power BI. Finally, the book will demonstrate the difference between M and DAX and show how results are produced in M. </p><p>By the end of this book, you’ll be ready to create impressive dashboards and multi-dimensional reports in Power Query and turn data into valuable insights.</p>
Table of Contents (17 chapters)
Free Chapter
1
Section 1: Overview of Power Pivot and Power Query
6
Section 2: Power Query Data Transformations
11
Section 3: Learning M

Summary

Looking back at this chapter, we started off by looking at the differences between the Excel and Power BI languages and how concatenation is similar but uses different languages. The ampersand operator (&) was used to show how we can join different strings, dates, and objects before examining how this was different, but similar, to using Text.From and Text.Combine.

The setting up of a SQL server is a bit technical and normally, a technician would set this up in a medium to large corporation, although this is changing in the current climate with the use of scalable online platforms that allow you to purchase only what you require, which makes this more affordable for smaller organizations. My advice when installing is to make sure you concentrate on the different steps, as if you change a setting such as the authentication, you might not be able to access your databases.

Lastly, we investigated parameters. We took an intensive look at setting up parameters and accessing...