Power BI Masterclass - Report Best Practice Cascading Filters Using DAX in Power BI

The video tutorial discusses the concept of cascading filters in data visualization, highlighting their importance for enhancing user experience in reports. It demonstrates how to create a bar chart to visualize sales data by customer countries and how to use slicers for data filtering. The tutorial identifies issues with non-cascading filters and provides a solution using DAX calculations to ensure only relevant data is displayed, improving the report's usability.

What is the primary visualization method used to display customer countries in the initial setup?

• Line Graph

• Pie Chart

• Bar Chart

• Map

What is the main issue encountered when using non-cascading filters with slicers?

• Data duplication

• Blank visuals

• Slow performance

• Incorrect data

Why do non-cascading filters lead to blank visuals?

• The visuals are not updated

• The filters are not applied

• The combination of filters does not exist

• The data is too large

What is a potential drawback of using bidirectional relationships in data models?

• Ambiguity in filtering results

• Simplified model structure

• Improved performance

• Increased data accuracy

Why should bidirectional relationships be avoided in complex models?

• They improve data accuracy

• They are easy to implement

• They can cause performance issues

• They simplify the model

What is the recommended solution to implement cascading filters without using bidirectional relationships?

• Changing the data source

• Using a different visualization tool

• Applying a DAX calculation

• Increasing the data size

What function is used in the DAX calculation to count rows in the orders table?

• MAX

• SUM

• AVERAGE

• COUNTROWS

How does the DAX calculation improve the user experience in reports?

• By increasing the number of visuals

• By ensuring relevant supplier names are shown

• By reducing the number of data points

• By simplifying the data model

What is the main benefit of using cascading filters in reports?

• Simplified data entry

• More accurate data representation

• Faster data processing

• Better user experience

What happens when you apply the DAX filter to the slicer?

• Only relevant suppliers are displayed

• All data is shown

• The data model is changed

• The report is refreshed