A practical walkthrough of Power BI Desktop covering purpose, UI, data flow, Power Query (M), DAX, relationships, visualization best practices, performance tips, and a micro walkthrough to publish reports. This learning experience breaks the content into sections with questions, flashcards, exercises, a concept map, and a mind map to reinforce understanding.
Power BI Desktop: Your Data Lab Coat (Without the Spills) "You already know what Power BI is — a whole analytics ecosystem. Now meet the tool that does the heavy lifting: Power BI Desktop." If the previous lesson was the trailer for a blockbuster called Power BI, this is the feature fi...
Why care about Desktop (quickly) Control : More granular access to data shaping and modeling than the web service. Power : Full Power Query and DAX capabilities live here. Authoring-first : Create complex reports and visuals, then publish. Imagine trying to bake a five-layer cake in a hotel ...
The UI: What you’ll stare at for many caffeinated hours The main places Ribbon — commands, transforms, modeling tools. Your toolbar of destiny. Left pane (Views) — switches between Report , Data , and Model views. Canvas — the whiteboard where visuals go. Visualizations pane — pick visuals...
The flow: From messy data to polished report Get Data — CSV, Excel, databases, web APIs, other sources. Transform (Power Query) — remove junk rows, pivot, unpivot, change types. Load to Model — decide which tables land in memory, create relationships. Model — create measures (DAX), calculate...
Tiny Power Query demo (M code snippet) A simple transformation: promote headers and change a column to number. let Source = Csv.Document(File.Contents("C:\data\sales.csv"),[Delimiter=",", Columns=5, Encoding=65001, QuoteStyle=QuoteStyle.None]), Promoted = Table.PromoteHeade...
Tiny DAX demo (your new math flex) Create a measure for total sales: Total Sales = SUM(Sales[Amount]) A calculated column example (be careful — calculated columns are stored per row): Sales[Year] = YEAR(Sales[Date]) DAX can be gloriously simple or mind-bendingly complex. Start with measu...
Visuals, interactivity, and polish Use slicers and bookmarks for guided storytelling. Place filters at the page or report level to manage scope. Use consistent colors and formatting; it’s not just pretty — it reduces cognitive load. Tooltips and drill-throughs add depth without clutter. Qu...
From zero to published: a micro walkthrough File > Get Data > Excel > pick file. Transform data: remove nulls, set types, rename columns. Close & Apply to load to the model. In Model view, create relationships and a Date table. Create measures (Total Sales, YoY Growth). In R...
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