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Explain the concept of many-to-many relationships in Power BI.
Last Updated: December 1, 2025A many-to-many relationship in Power BI occurs when multiple records in one table are related to multiple records in another...
What is a star schema and how does it relate to Power BI data modeling?
Last Updated: December 1, 2025A star schema is a data modeling design that organizes data into a central fact table connected to multiple dimension...
What are time intelligence functions in DAX?
Last Updated: December 1, 2025Time intelligence functions in DAX are built-in functions that allow you to perform calculations over time periods — like comparing...
How do you handle missing or null values in Power BI?
Last Updated: December 1, 2025Handling missing or null values in Power BI is a crucial step in ensuring accurate analysis and clean visuals. I...
How would you optimize a Power BI report for performance?
Last Updated: December 1, 2025Optimizing a Power BI report for performance is all about improving speed, reducing model size, and ensuring queries run efficiently....
What is the difference between direct query and import mode in Power BI?
Last Updated: December 1, 2025The main difference between DirectQuery and Import mode in Power BI lies in how data is stored and how queries...
How do you use DAX to create a date table?
Last Updated: December 1, 2025In Power BI, a Date table is essential for performing time intelligence calculations like year-to-date, month-over-month growth, or same-period-last-year comparisons....
What is Power Query Editor and what role does it play?
Last Updated: December 1, 2025Power Query Editor is the data transformation and preparation layer in Power BI. It’s the place where we connect to...
Explain the difference between a calculated column and a measure in Power BI.
Last Updated: December 1, 2025A calculated column and a measure in Power BI both use DAX, but they serve different purposes and are evaluated...
What is DAX? How is it used in Power BI?
Last Updated: December 1, 2025DAX stands for Data Analysis Expressions. It’s a formula language used in Power BI, Excel Power Pivot, and SSAS Tabular...