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

Implementing top N analysis

People and companies love top N lists. There are whole websites dedicated to The top 10 foods that celebrity data analysts like to eat and Top 25 ways to make your Power BI data model faster. Not really, but I would definitely sign up for the first one!

Top N lists can provide useful information for organizations. Data consumers like to see what the company's top-selling products are. What is the most popular color widget? How do I compare my top 10 product's revenue against the rest?

There are actually two different problems here. One is to generate a ranking function and display it, and the other is to create a top N table to use a filter in a measure.

Ranking function

You can create a rank and ordered list by using the RANKX function. This is another one of those X functions that aggregate over a table. It will produce a numerical ranking of a category by an expression:

RANKX(<table>, <expression>[, <value>...