Business Intelligence with Microsoft Power BI - with Material - Writing a Simple M Code

The video tutorial provides a step-by-step guide on using Power Query in Power BI. It begins with creating a blank query and writing simple M code to perform basic arithmetic operations. The tutorial explains how to view and modify the output using the advanced editor, and addresses common errors. It concludes by demonstrating how to finalize the output and encourages further exploration of more complex functions in M language.

What is the purpose of creating a blank query in Power Query?

• To import data from an external source

• To write custom M code without predefined data

• To visualize data in a dashboard

• To automatically generate a data model

In the M code, what does the variable 'C' represent?

• The product of variables A and B

• The division of variables A and B

• The sum of variables A and B

• The difference between variables A and B

What happens to variables that are not used in the M code?

• They are displayed in the output

• They cause an error in the code

• They are ignored and not visible in the output

• They are automatically deleted

How can you change the output variable in the M code?

• By renaming the query

• By modifying the 'in' statement in the advanced editor

• By changing the data type of the variable

• By adding a new step in the query

What is a common mistake to avoid when writing M code in Power Query?

• Not using the advanced editor

• Leaving a comma at the end of the 'let' block

• Forgetting to save the query

• Using too many variables