Power BI 面试题与答案
问题 21. What is the purpose of the 'Drillthrough' feature in Power BI?
The 'Drillthrough' feature in Power BI allows users to navigate from a summary report to a detailed report by clicking on a data point. It provides a way to explore data at a more granular level.
问题 22. How can you create custom visuals in Power BI?
Custom visuals in Power BI can be created using the Power BI Developer Tools in Visual Studio Code. Developers can use TypeScript and the Power BI JavaScript API to build and deploy custom visuals.
问题 23. What is the role of the 'Card' visual in Power BI?
The 'Card' visual in Power BI is used to display a single, key data point. It is often used to show a summary or a key performance indicator (KPI) in a concise and easily readable format.
问题 24. How can you create a calculated column in Power Query?
Calculated columns in Power Query are created using the 'Add Column' tab in Power Query Editor. You can use M language expressions to define calculations based on existing columns in the data.
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