Merge Queries combines tables using matching columns, similar to a database join, so related data can be analyzed together.
Duration of the online course: 4 hours and 44 minutes
Turn raw data into clear dashboards with this free Power BI course—learn Power Query, modeling, and visuals fast to boost your BI skills and career.
Build confidence turning messy spreadsheets into insights that people can actually act on. This free online course takes you from Power BI beginner to a solid intermediate level by guiding you through the real workflow used in reporting and business intelligence: getting data in, shaping it, modeling it correctly, and presenting results with clear, compelling visuals.
You’ll start by understanding what Power BI is and how it fits into a modern data analytics toolkit. From there, you’ll work inside Power BI Desktop and learn settings that make your environment smoother and more reliable. A strong focus is placed on Power Query because clean data is the foundation of every good report. You’ll practice using Transform Data to open the Power Query Editor, fix common issues, and prepare datasets so refreshes work consistently instead of breaking at the last moment.
As you progress, you’ll see how separate files and tables come together in a useful model. You’ll learn why merge queries matter when you need to combine information across sources, and you’ll understand the kind of problems that cause visuals to disappear or show incomplete results. Instead of memorizing clicks, you’ll build a mental model for diagnosing what went wrong and how to correct it efficiently.
The course also emphasizes modeling choices that unlock better analysis. You’ll explore why adding a dedicated dates table is essential for time-based reporting and for making filters and trends behave the way decision-makers expect. You’ll use calculated columns with intention, including formatting values for readability, and you’ll understand when calculated columns help your model support more meaningful reporting.
By the end, you’ll be able to prepare data, connect tables thoughtfully, and produce dashboards that communicate insights quickly—skills that translate directly into day-to-day tasks in data science and business intelligence roles.
4 hours and 44 minutes of online video course
Digital certificate of course completion (Free)
Exercises to train your knowledge
100% free, from content to certificate
What is the purpose of using Merge Queries in Power BI Power Query?
Merge Queries combines tables using matching columns, similar to a database join, so related data can be analyzed together.
Why should I add a dedicated date table to a Power BI data model?
A date table supports accurate time-intelligence calculations such as year-to-date totals, monthly comparisons, and period filtering.
What does Transform Data do in Power BI Desktop?
Transform Data opens Power Query Editor, where you can clean, reshape, combine, and prepare data before loading it into the model.
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Course comments: Power BI beginner to intermediate
Sarah Adhiambo Ohanga
Kindly be attaching the data that the instructor is using for easy follow up and practical cases
Beevi Fathima
hello sir,