Crucial Exams

Microsoft Power BI Data Analyst Practice Question

In Power Query Editor you have a query named FactSales that contains 25 million rows with the columns TerritoryID, OrderDate, and SalesAmount. You must create a second query named TerritoryStats that

  • returns exactly one row per TerritoryID,
  • includes two aggregated columns: TotalSales (sum of SalesAmount) and FirstSaleDate (earliest OrderDate), and
  • is loaded to the data model while FactSales continues to load using incremental refresh. The solution must minimize memory usage and avoid bringing another full copy of the 25 million detail rows into the evaluation container during refresh. Which approach should you use?

  • Reference the FactSales query, apply a Group By transformation on TerritoryID that sums SalesAmount and finds the earliest OrderDate, and load both queries.

  • Within FactSales itself, insert a Group By step that aggregates on TerritoryID, then create a new query that references FactSales and removes unnecessary columns.

  • Duplicate the FactSales query, then apply a Group By transformation on TerritoryID to create TotalSales and FirstSaleDate, and load both queries.

  • Create a Mashup Evaluation Container to pre-aggregate FactSales, then disable load for FactSales and load only the aggregated result.

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