Book Image

Microsoft Power BI Data Analyst Certification Guide

By : Orrin Edenfield, Edward Corcoran
5 (1)
Book Image

Microsoft Power BI Data Analyst Certification Guide

5 (1)
By: Orrin Edenfield, Edward Corcoran

Overview of this book

Microsoft Power BI enables organizations to create a data-driven culture with business intelligence for all. This guide to achieving the Microsoft Power BI Data Analyst Associate certification will help you take control of your organization's data and pass the exam with confidence. From getting started with Power BI to connecting to data sources, including files, databases, cloud services, and SaaS providers, to using Power BI’s built-in tools to build data models and produce visualizations, this book will walk you through everything from setup to preparing for the certification exam. Throughout the chapters, you'll get detailed explanations and learn how to analyze your data, prepare it for consumption by business users, and maintain an enterprise environment in a secure and efficient way. By the end of this book, you'll be able to create and maintain robust reports and dashboards, enabling you to manage a data-driven enterprise, and be ready to take the PL-300 exam with confidence.
Table of Contents (25 chapters)
1
Part 1 – Preparing the Data
6
Part 2 – Modeling the Data
11
Part 3 – Visualizing the Data
15
Part 4 – Analyzing the Data
18
Part 5 – Deploying and Maintaining Deliverables
21
Part 6 – Practice Exams

Identifying data anomalies

We will start with the same tool, the Power BI Power Query Editor, that we used to connect to and transform our data in Chapter 2, Connecting to Data Sources. The Power Query Editor provides several tools to help us to identify anomalies.

Figure 3.1 – Power BI Desktop Power Query Editor

You will find most of the tools on the View ribbon. You may be tested on any or all of these in the certification exam.

Figure 3.2 – Power Query Editor showing that we have nulls in our column

It is very important to note, and it may come up on the test, that the Power Query Editor only looks at the first 1,000 rows of data. In the lower left-hand corner of the Power Query Editor, you will see a selector to change the Power Query Editor to scan your entire dataset.

Figure 3.3 – Controlling how many columns are profiled

Real-World Tip

You may not want to do this against very...