Unpivoting columns in Power BI - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does unpivoting columns mean in Power BI?

Unpivoting columns means turning columns into rows to make data longer and easier to analyze, like changing a wide table into a tall one.

beginner

Why do we unpivot columns in data preparation?

We unpivot columns to organize data in a way that tools like Power BI can easily summarize and visualize it, especially for time series or category data.

beginner

In Power BI, where do you perform unpivoting of columns?

You perform unpivoting in Power Query Editor by selecting columns and choosing 'Unpivot Columns' from the Transform tab.

intermediate

What is the difference between unpivoting and pivoting?

Unpivoting turns columns into rows (wide to long), while pivoting turns rows into columns (long to wide).

intermediate

How does unpivoting help with creating visuals in Power BI?

Unpivoting organizes data so each row is a single data point, making it easier to create charts like line graphs or bar charts that compare categories over time.

What happens when you unpivot columns in Power BI?

A Data is duplicated

B Columns become rows

C Data is deleted

D Rows become columns

Unpivoting changes columns into rows to reshape the data.

Where do you find the 'Unpivot Columns' option in Power BI?

A Power Query Editor

B Report view

C Data view

D Dashboard

Unpivoting is done in Power Query Editor during data transformation.

Why is unpivoting useful for time series data?

A It groups all dates into one column

B It deletes unnecessary dates

C It converts dates from columns into rows for easier analysis

D It creates new date columns

Unpivoting converts date columns into rows, making time series easier to analyze.

Which of these is NOT true about unpivoting?

A It makes data wider

B It makes data longer

C It helps with better visualization

D It changes columns into rows

Unpivoting makes data longer, not wider.

After unpivoting, what do the new columns usually represent?

A Only dates

B Only numeric values

C Summarized totals

D Category and value pairs

Unpivoting creates columns for categories (former column names) and their values.

Explain in your own words what unpivoting columns does and why it is useful in Power BI.

Think about changing a wide table into a tall table.

Describe the steps to unpivot columns in Power BI's Power Query Editor.

Focus on the tool and menu options.