Power BI Basics: Understanding Data Transformation (Power Query)

In this short tutorial, I explain what data transformation actually means in Power BI, and why it happens before your data ever reaches visuals or DAX.

Using Power Query in Power BI Desktop, you’ll see how raw, messy data is cleaned, renamed, and prepared into a shape that’s ready for proper analysis.
This is where good Power BI reports are made — or quietly ruined.

This video is part of the Power BI Basics series, focused on getting the fundamentals right from the start.

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Covered in This Video
• What “transformed data” means in Power BI
• Where Power Query fits in the Power BI workflow
• Why transformations happen before modelling and DAX
• How raw data is cleaned and prepared
• Common beginner mistakes in Power Query

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Chapters

00:00 What data transformation means
00:35 Power Query’s role in Power BI
01:15 Cleaning and renaming columns
01:55 Preparing data for analysis
02:30 Common mistakes
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Microsoft Learn (Recommended)

To practise this properly using Microsoft’s official guidance, use the related Learn module:
https://learn.microsoft.com/en-us/training/modules/clean-data-power-bi/

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From TikTok to YouTube

If you found this via TikTok — welcome.
Short-form videos hook attention; YouTube videos explain things clearly.

👉 TikTok: @that.dataguy

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Working With Me

I help businesses turn messy spreadsheets into clear, reliable Power BI dashboards — built properly, not patched together.

If you want help fixing your data, automating reporting, or setting up Power BI the right way:
👉 https://jrdata.solutions

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Power BI Basics Playlist

▶️ https://www.youtube.com/playlist?list=PLB-VUakt-tYtE5zF1IMaSH6vmzhmEcsOk

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About the Channel

I’m The Data Guy.
I build real Power BI solutions and explain data concepts clearly, correctly, and without fluff.

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Hashtags

#PowerBI
#PowerBIBasics
#PowerQuery
#DataAnalytics
#thatdataguy

Видео Power BI Basics: Understanding Data Transformation (Power Query) канала That Data Guy 📈