Power BI Masterclass - Reference Rows or Lookup Values from Tables with DAX in Power BI

The video tutorial explores how to perform column lookups and shifts in Power BI, contrasting it with Excel's simpler cell reference method. It covers creating helper columns, sorting data, and implementing lookup measures using DAX expressions. The tutorial also demonstrates calculating differences between rows and addresses sorting issues, emphasizing Power BI's column-based approach.

What is a key difference between performing lookups in Excel and Power BI?

• Power BI allows cell-wise operations like Excel.

• Excel requires DAX expressions for lookups.

• Excel does not support lookups.

• Power BI operates column-wise, unlike Excel.

Which option is NOT a method to import data into Power BI?

• Importing from Excel

• Using a CSV file

• Directly typing data into Power BI

• Using a JSON file

What is the first step in preparing data for lookups in Power BI?

• Sorting the data

• Adding helper columns

• Importing data from Excel

• Creating visualizations

What is the purpose of creating helper columns in Power BI?

• To delete unnecessary data

• To assist in data shifting and lookups

• To create visualizations

• To add more data to the table

Which function in Power BI is similar to VLOOKUP in Excel?

• MATCH

• FILTER

• INDEX

• LOOKUPVALUE

How can you sort a column in Power BI by another column?

• By exporting to Excel and sorting there

• By using a DAX formula

• By manually rearranging the rows

• By using the 'Sort by Column' option

What function is used to calculate differences between rows in Power BI?

• DIFFERENCE

• HASONEVALUE

• LOOKUPVALUE

• SUM

What is the role of the 'Selected Value' function in Power BI?

• To create a new column

• To filter out blank values

• To return a single value from the current selection

• To select multiple values from a column

Why is it important to handle blank values in Power BI calculations?

• To make the data visually appealing

• To ensure accurate data representation

• To reduce the file size

• To increase the speed of calculations

What is the main benefit of using the LOOKUPVALUE function in Power BI?

• It allows lookups without a table connection

• It requires a relationship between tables

• It can only be used within the same table

• It is faster than Excel's VLOOKUP