Power BI Masterclass - Power BI Trick Incremental Refresh Tables Using DAX

The video tutorial explains how to implement an incremental refresh in Power BI, a feature typically available only in premium accounts. The instructor demonstrates how to set up a custom incremental refresh using Excel data, focusing on refreshing only the 2021 data while keeping 2019 and 2020 data unchanged. The tutorial covers importing data, using DAX expressions to combine tables, and visualizing the results in Power BI. The process is tested by updating the Excel data and refreshing the Power BI report to show changes only in the 2021 data.

What is the main reason for using incremental refresh in Power BI?

• To increase the size of the data set

• To enable data sharing across multiple users

• To reduce the time taken to refresh large data sets

• To improve the visual appearance of reports

Why might smaller companies find the default incremental refresh feature in Power BI unsuitable?

• It is only available for government organizations

• It requires advanced technical skills

• It does not support Excel data sources

• It is a premium feature and may be too costly

In the manual setup of incremental refresh, which year's data is set to be refreshed?

• All years

• 2021

• 2020

• 2019

What is the purpose of using the 'Union' keyword in DAX expressions?

• To sort data in ascending order

• To combine tables with matching columns

• To filter data based on conditions

• To create a new column in a table

How can you hide tables in Power BI that are not needed in the final report?

• By exporting them to Excel

• By renaming them to 'Hidden'

• By using the 'Hide' option in the interface

• By deleting them from the data model

What happens when you refresh the data in Power BI after setting up the incremental refresh?

• All data is refreshed regardless of settings

• Only the specified year's data is refreshed

• The data model is reset to default

• The report layout is changed

What is the expected outcome after updating the Excel file and refreshing Power BI?

• All years' data will show changes

• Only the closed years will show changes

• Only the open year's data will show changes

• No changes will be visible