What is Power BI?

Data Visualization in Power BI

Power BI features

Power BI Components

Feature Power BIData Visualization Power BI provides a strong backend data manipulation feature

with access to simple visualizations.

Size of Dataset Power BI has a limit of 1GB data in free version.

Costing Power BI provides a free version with 1GB limint on dataset.Power BI pro is also a cheaper solution when compared with any other BI tool.

Implementation Power BI uses cloud storage and includes simple implementation process

Excel vs Power BI

Power BI is a tool that let you interactively explore data to gain insights.Power BI enables you to effectively report insights through easy-to-use customizable visualization.Self-Service BI

Power BI Desktop Desktop version Data analysis and report creation tool. Include Power Query Editor 100% FreePower BI Service Cloud based version Light report editing Share and distribute reports

Data view helps you inspect, explore, and understand data in your Power BI Desktop model.With Data view, you're looking at your data after it has been loaded into the model.

View and work with complex datasets that contain many tables.Create relationship among tablesDefine storage mode Import DirectQuery Dual

1. Data view icon. Select this icon to enter Data view.2. Data Grid. This area shows the selected table and all columns and rows in it. Columns hidden from Report view are greyed out. You can right-click on a column for options.3. Modeling ribbon. Here you can manage relationships, create calculations, change data type, format, data category for a column.4. Formula bar. Enter Data Analysis Expression (DAX) formulas for Measures and Calculated columns.5. Search. Search for a table or column in your model.6. Fields list. Select a table or column to view in the data grid.

Visually presenting data let people interpret and analyze data faster.

Power BI interface

Power BIOne Data Set, Multiople Reports,Central Data

Excel | Share ReportsCan’t Control Data Source

Report View

Modeling View

Data View

The flow of work in Power BI

3 different views

1. Report view2.Data view3.Model view

2021 © TRUE DIGITAL ACADEMY Data Analytics Intermediate I Module 3: Data Analytics with Power BI (PART 1)

Data Analytics Intermediate 1Data Analytics with Power BI (PART 1)

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3

PowerBI Data Sources

Transforming Data

Power BI supports large range of data sources. You can click Get data and it shows you all the available data connections.

Raw data usually doesn't arrive in the perfect form when you account for things like human errors, bugs, and file conversion. Dataset may contain:

Get Data

Connect to many different data sourcesTransform the data into the shape you want

Power Query

Visualization components

Cleaning and transforming dataCleaning data Transforming data

Process of detecting andremoving corrupted orinaccurate records from a record set, table, or database.

Process of converting datafrom one format or structureinto another format orstructure

Helps to clean the dataset andimprove the data consistency.

Helps to make dataprocessing easier.

Why data transformation? Transforming data at column level

Changethe bar chart to a line chart

Publish Reports to Power BI service

Database: Import vs DirectQueryFollowing are the available data sources in Power BI:

Flat Files SQL Database OData Feed Blank Query Azure Cloud platform Online Services Blank Query Other data sources such as Hadoop, Exchange, or Active Directory

pass:

Server name User name password

Other

Web Data DFS Active Directory

Columns you don’t need Inconvenient and inconsistent formatting Extra characters Blank rows

Cleaning data at row-level Remove top row User first row as headerTransforming data at Column-level Change data type Format (decimal, $) Data category

Creating a Bar Chart Click on the Clustered Bar Chart under the Visualization section Add the required fields: Axis: Please specify the Column that represents the Horizontal Bars. Values: Any Numeric value such as sales amount, Total Sales, etc.

Making maps with geographic data (Data Type: Country/Regions) Maps are an engaging way to present data with a geographic layer. For example, 10 Countries with highest number of COVID-19 infections

Online ServicesPower BI also allows you to connect to different online services such as

Exchange Salesforce Google Analytics Facebook.

Power BI contains various default data visualization components that include: Simple bar charts Pie charts Maps Complex models such as: Waterfalls Funnels Gauges

If you want to publish reports to Power BI service to share with others Click Publish button Select your workspace that you want to publish Click ‘Got it’

SlicerA slicer is an alternate way of filtering that narrows the portion of the dataset shown in the other visualizations in a report.

DirectQuery option limits the option of data manipulation and the data stays in SQL database. DirectQuery is live and there is no need to schedule refresh as in the Import method.

Import method allows to perform data transformation and manipulation. When you publish the data to PBI service, limit is 1GB. It consumes and pushes data into Power BI Azure backend and data can be refreshed up to 8 times a day and a schedule can be set up for data refresh

2021 © TRUE DIGITAL ACADEMY Data Analytics Intermediate I Module 3: Data Analytics with Power BI (PART 1)

Data Analytics Intermediate 1Data Analytics with Power BI (PART 1)

Module

3