Power BI for Data Analysts
📊 Power BI for Data Analysts
Power BI is the dominant business intelligence tool in European and enterprise companies. It's mentioned in 58% of analyst job postings — and the PL-300 certification is one of the highest-ROI credentials you can earn.
This page is your free Power BI learning hub. Bookmark it and come back.
Why Power BI?
- Free to learn — Power BI Desktop is 100% free. No subscription needed to build and practice.
- Enterprise standard — used at Deloitte, Accenture, KPMG, Siemens, and virtually every large European company
- Connects to everything — Excel, SQL databases, SharePoint, Salesforce, Azure, Google Analytics and more
- Certifiable — the PL-300 is our #1 recommended certification for analysts in Europe
Power BI Learning Path
- Week 1: Getting Started — Install Power BI Desktop, connect to an Excel file, build your first bar chart and line chart
- Week 2: Power Query (M) — Clean and transform data without touching the source: remove nulls, split columns, pivot/unpivot, merge queries
- Week 3: Data Modelling — Build star schemas, understand relationships (one-to-many), create calculated columns vs measures
- Week 4: DAX Basics — SUM, CALCULATE, FILTER, ALL, DIVIDE, RELATED — the 80% of DAX you'll use 95% of the time
- Week 5: DAX Advanced — Time intelligence: SAMEPERIODLASTYEAR, DATESYTD, running totals, MoM % change
- Week 6: Dashboard Design — Layout, colour theory, when to use which chart, slicers, bookmarks, drill-through
- Week 7: PL-300 Prep — Practice exams, weak-spot review, exam strategy
Essential DAX Reference
| DAX Function | What it does | Example |
|---|---|---|
SUM() |
Total of a column | Total Sales = SUM(Sales[Amount]) |
CALCULATE() |
Evaluate expression with modified filter | Sales 2024 = CALCULATE(SUM(Sales[Amount]), YEAR(Sales[Date])=2024) |
DIVIDE() |
Safe division (handles divide-by-zero) | Margin % = DIVIDE([Profit],[Revenue],0) |
COUNTROWS() |
Count rows in a table or filter context | Order Count = COUNTROWS(Orders) |
RELATED() |
Lookup value from related table | Category = RELATED(Products[Category]) |
SAMEPERIODLASTYEAR() |
Prior year comparison | Sales LY = CALCULATE([Total Sales], SAMEPERIODLASTYEAR(Date[Date])) |
RANKX() |
Rank items in a table | Rank = RANKX(ALL(Products), [Total Sales]) |
Power BI vs Tableau — Which Should You Learn?
| Factor | Power BI | Tableau |
|---|---|---|
| Cost (Desktop) | Free | Free (public) / paid (full) |
| European enterprise market | ✅ Dominant | Less common |
| US tech companies | Less common | ✅ More common |
| Best certification | PL-300 (€165 exam) | Tableau Desktop Specialist ($250) |
| Recommendation | Start here if in Europe | Add later if targeting US tech |
Free Power BI Resources
- 📺 Guy in a Cube (YouTube) — best free Power BI channel, period
- 📚 Microsoft Learn — Power BI — official free training path
- 📐 SQLBI.com — the deepest DAX resource on the internet
- 🎯 PL-300 Exam Page — official study guide and practice assessments
Practice Datasets
- AdventureWorks — Microsoft's sample sales/HR dataset, perfect for Power BI practice
- Contoso Sales — another Microsoft sample, great for retail analytics
- Your own company data — Export a CSV from any system you already use at work and build a real dashboard
Ready-Made Power BI Templates
Skip the setup. Our Dashboard Templates Bundle includes 3 professionally designed Power BI dashboards — Sales Performance, HR Analytics, and E-commerce — each with sample data and step-by-step setup guides.