20180901 - 9th Meeting - Power BI Module 0-1

9th Meeting
Power BI Module 0-1
9:00PM - September 1st, 2018
Lai Trung Minh Duc | DucLTM@outlook.com
Microsoft Student Partners Vietnam | Vietnam BI Community
Lai Trung Minh Duc | Sept 2018 | DucLTM@outlook.com 1

Agenda
• Module 0 – Introduction (Review in Meeting 8th)
• Module 1 - Power BI Desktop Data Transformations
• Changing Locale to current Location/Time-zone (for currency, timing)
• Connecting to Database/ Services/ Text files folder to get data
• Basic transformation
• Advanced transformation
• Relationship in Tables

Agenda
• Module 1 - Power BI Desktop Data Transformations
• Enter Data
• Query Diagram Dependency
• Query Parameter

Introduction
Lai Trung Minh Duc
Former External Economics student @ FTU
Former Solution Architect @ Savills Vietnam
Information Assurance student @ FPT
Tech-writer @ Duck’s Tech Zone
Full stack Developer @ Pizitech LTD.
Tech-trainer @ Microsoft Student Partners Vietnam
Tech-love: ASPNET Core, Python, Angular, Docker, SQL
Interests: Data Visualization, Data Analytics, Finance, Marketing

Module 0
Power BI Overview

Module 0 | Power BI Overview
https://www.youtube.com/watch?v=YXTe_8-8EzE https://www.slideshare.net/MinhDucLaiTrung/2018
0826-8th-meeting-power-bi-orientation/

Module 1
Power BI Desktop Data Transformations

Module 1 | Change Locale
• Purpose: Synchronize time-zone, currency,
date format, decimal delimiter with Data
source.
• (Ex: DD/MM/YYYY versus MM/DD/YYYY)
• Normally, Power BI take locale value of
current Windows system.
• Steps: File >> Options & Settings >> Options

Module 1 | Connect to Database/Services
• File (6 connectors)
• Database (19 connectors)
• Power BI (1 connectors)
• Azure (11 connectors)
• Online Services (36 connectors)
• Other (12 connectors)
https://docs.microsoft.com/en-us/power-
bi/desktop-data-sources

Module 1 | Power BI connectors
SQL Database connector

Excel connector

CSV Text File connector

Web Connector

| Explain Web Connector
• Anonymous (Public content)
• Windows (Active Directory control in LAN Company network)
• Basic (Username – Password)
• Web API (Header Token)
• Organizational Account (Login to get company resource)

Folder connector (for Excel, CSV, Text files,…)

Microsoft Access connector

| Microsoft Access important note
Microsoft Access connector

Module 1 |Navigator
• Select Related Tables (check and
get relationship – related tables)
→ Relationship must be configured
in SQL Database.
• Load (Load directly to Data model)
• Edit (Popup the Power Query)

Module 1 | Demo Power BI Connector |
Navigator
• SQL Database
• Web Connector
• HTML Table: https://en.wikipedia.org/wiki/List_of_largest_cities
• JSON file: http://api.tvmaze.com/singlesearch/shows?q=mr-
robot&embed=episodes
• Navigator

Module 1 | Basic Transformation
• Query
• Duplicate column
• Rename column
• Change data-type
• Data Filter
• Apply filter and Power BI will ask to reload the Data → After loading to Data model, use that data only
• Filter in Power Query (Power BI or Excel) is different from Filter in Excel Table (or Pivot Table)

Module 1 | Advanced Transformation
• Date Extraction (Year, Month, Day, Hour, Minute, Second, Timezone,
DayOfWeek,…)
• Split column data (By length, by character)
• Conditional column (IF – THEN – ELSE IF – THEN – ELSE )

• Merge Query (Similar to JOIN in SQL):
• Left Outer
• Right Outer
• Full Outer
• Inner
• Left Anti
• Right Anti
• http://radacad.com/append-vs-merge-in-power-bi-and-power-query

• Append Query (Similar to UNION in SQL):
• If queries have same columns → Best scenario
• Else
→ Number of columns = number of same columns + number of different columns
→ Row will contain NULL value in some columns without data
• http://radacad.com/append-vs-merge-in-power-bi-and-power-query

Module 1 | Relationship
• One-to-One
• One-to-Many
• Many-to-one
• Many-to-Many (simplify to One-to-many)

Module 1 | Relationship
• One-to-One
• One-to-Many
• Many-to-one
• Many-to-Many (simplify to One-to-many)
https://docs.microsoft.com/en-us/power-bi/desktop-create-and-manage-
relationships

Module 1 | Enter Data
• Copy data from Excel without using connecting feature
• Self typing the data

Module 1 | Query Dependency View
• View the dependent of each query (where does the value come from?)

Module 1 | Query Parameter
• Filter Power Query data by end-user
• Predefined value for columns
https://www.youtube.com/watch?v=0B3kmAsEJHY

QUIZ
Any help?

THANK YOU
DucLTM@outlook.com

20180901 - 9th Meeting - Power BI Module 0-1

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