Stop 07 · BI Tools & DashboardsTopics · 1/9

Power BI Fundamentals

In short

Managers don't want your notebook. They want one page they open every morning that's already up to date. In a lot of companies, that page is built in Power BI.

Microsoft's BI tool — importing data, building visuals by dragging fields onto a canvas, and organizing them into report pages — the most common BI tool in Microsoft-heavy enterprises.

The jaadu sits at a steering wheel smiling at a dashboard of round dials.

Think of it like this

The car dashboard

A driver doesn't open the engine to check speed and fuel. The dashboard reads the sensors and shows just what matters, live. Power BI does that for a business: it pulls from the data sources, does the maths, and shows the few dials people need.

Watch it happen

How a Power BI report gets built

Get data

Power Query

Model

DAX

Report

Publish

1/6Connect to Excel files, a SQL database or a folder of CSVs from Power BI Desktop.

The big ideas

What you need to know

Desktop vs Service

Power BI Desktop is the free Windows app where you build. The Service is the website where reports are shared and refreshed.

Power Query = repeatable cleaning

Like recording your Excel clean-up as steps that rerun on every refresh.

Star schema model

One fact table of events, like sales, linked to dimension tables like Date, Product and Customer.

Sharing needs licences

Sharing with colleagues usually needs a paid licence or company capacity. Check what your organisation uses before promising access.

Save yourself the pain

Common mistakes

Oops

Importing one giant flat table with everything repeated on every row.

Do this instead

Split into a fact table and small dimension tables. The model is faster and DAX is simpler.

Oops

Cleaning data in Excel by hand before loading it.

Do this instead

Do the cleaning in Power Query so it repeats on every refresh, without you.

Your mission

Your first Power BI report

~40 min

Quick check

Where should repeatable cleaning steps like fixing types and removing blank rows live in Power BI?

Go deeper

1Install Power BI Desktop (free) and load a sample dataset.
2Build 3-4 basic visuals (bar chart, line chart, card) from the same data.
3Learn the difference between Power BI Desktop (building) and the Service (sharing).