Table and matrix visuals in Power BI - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the main difference between a Table visual and a Matrix visual in Power BI?

A Table visual shows data in simple rows and columns without grouping, while a Matrix visual allows grouping and drilling down into hierarchical data with expandable rows and columns.

beginner

How can you add subtotals in a Matrix visual?

You can enable subtotals in the Format pane under 'Subtotals' by turning on subtotals for rows or columns, which helps summarize grouped data.

beginner

What feature in Matrix visuals allows users to expand or collapse grouped data?

The 'Expand/Collapse' buttons let users drill down or roll up grouped data levels interactively in a Matrix visual.

intermediate

Can you apply conditional formatting in Table and Matrix visuals? If yes, how?

Yes, you can apply conditional formatting by selecting the field in the visual, then using the Format pane to set rules for colors, data bars, or icons based on values.

beginner

Why would you choose a Matrix visual over a Table visual?

Choose a Matrix when you want to show hierarchical data with grouping, subtotals, and drill-down capabilities. Use Table for simple flat lists without grouping.

Which visual allows you to drill down into grouped data in Power BI?

A Table visual

B Matrix visual

C Card visual

D Pie chart

Matrix visuals support drill-down and grouping, while Table visuals do not.

How do you enable subtotals in a Matrix visual?

A Use the Data view

B Add a new measure

C Use the Format pane and turn on Subtotals

D Subtotals are automatic and cannot be changed

Subtotals are controlled in the Format pane under the Subtotals section.

Which visual is best for showing simple lists without grouping?

A Matrix visual

B Map visual

C Scatter chart

D Table visual

Table visuals display flat lists without grouping or hierarchy.

Can you apply conditional formatting to a Table visual in Power BI?

A Yes, using the Format pane

B No, only Matrix supports it

C Only with custom visuals

D Only in Power Query

Both Table and Matrix visuals support conditional formatting via the Format pane.

What does the Expand/Collapse feature in a Matrix visual do?

A Shows or hides grouped data levels

B Changes the color of rows

C Sorts the data alphabetically

D Filters the data by date

Expand/Collapse lets users drill into or roll up grouped data levels.

Explain how you would use a Matrix visual to show sales data grouped by region and product category with subtotals.

Think about how hierarchical data is organized and summarized.

Describe the steps to apply conditional formatting to highlight high sales values in a Table visual.

Conditional formatting helps make important data stand out visually.

Practice

1. What is the main difference between a Table visual and a Matrix visual in Power BI?

easy

A. Tables can show images, matrices cannot.

B. Matrix visuals allow grouping and subtotals, tables do not.

C. Tables support drill-down, matrices do not.

D. Matrix visuals cannot display numeric data.

Solution

1. Step 1: Understand Table visual features

   Tables display data in simple rows and columns without grouping or subtotals.

2. Step 2: Understand Matrix visual features

   Matrices allow grouping by rows and columns and show subtotals for those groups.

3. Final Answer:

   Matrix visuals allow grouping and subtotals, tables do not. -> Option B

4. Quick Check:

   Grouping and subtotals = Matrix [OK]

Hint: Remember: Matrix = grouping + subtotals, Table = simple rows [OK]

Common Mistakes:

• Thinking tables support grouping and subtotals
• Confusing drill-down features between visuals
• Assuming matrices cannot show numbers

2. Which of the following is the correct way to add a field to the Rows area in a Matrix visual in Power BI?

easy

A. Drag the field into the Rows area.

B. Drag the field into the Filters area.

C. Drag the field into the Values area.

D. Drag the field into the Columns area.

Solution

1. Step 1: Identify the Rows area in Matrix visual

   The Rows area is where you place fields to group data vertically in a matrix.

2. Step 2: Correct placement of fields

   Dragging a field into the Rows area groups data by that field in rows.

3. Final Answer:

   Drag the field into the Rows area. -> Option A

4. Quick Check:

   Rows area = drag fields here for row grouping [OK]

Hint: Drag fields to Rows area for vertical grouping in matrix [OK]

Common Mistakes:

• Dragging fields to Values instead of Rows
• Confusing Columns and Rows areas
• Placing fields in Filters instead of Rows

3. Given a Matrix visual with Category in Rows and Year in Columns, what will be shown if you add Sales to Values?

medium

A. A list of all sales transactions without grouping.

B. Sales totals only by Category without Year breakdown.

C. Sales totals only by Year without Category grouping.

D. Sales totals grouped by Category and Year with subtotals.

Solution

1. Step 1: Understand Matrix grouping by Rows and Columns

   Category in Rows groups data vertically; Year in Columns groups data horizontally.

2. Step 2: Adding Sales to Values

   Sales values will be aggregated for each Category-Year combination, showing subtotals.

3. Final Answer:

   Sales totals grouped by Category and Year with subtotals. -> Option D

4. Quick Check:

   Matrix with Rows + Columns = grouped totals [OK]

Hint: Rows + Columns + Values = grouped totals with subtotals [OK]

Common Mistakes:

• Ignoring the column grouping by Year
• Expecting ungrouped transaction list
• Confusing subtotals with raw data

4. You created a Matrix visual but subtotals are not showing. What is the most likely reason?

medium

A. Subtotals are disabled in the Matrix visual settings.

B. You did not add any fields to the Values area.

C. The data source has no numeric columns.

D. Matrix visuals never show subtotals.

Solution

1. Step 1: Check Matrix visual subtotal settings

   Subtotals can be turned on or off in the Format pane under Subtotals.

2. Step 2: Confirm fields and data type

   Even with fields added, subtotals won't show if disabled in settings.

3. Final Answer:

   Subtotals are disabled in the Matrix visual settings. -> Option A

4. Quick Check:

   Subtotals off in settings = no subtotals shown [OK]

Hint: Check subtotal toggle in Format pane if subtotals missing [OK]

Common Mistakes:

• Assuming subtotals show automatically without enabling
• Thinking numeric data is required for subtotals
• Believing matrices never show subtotals

5. You want to create a report showing sales by Product Category and Region with subtotals for each. Which visual and setup is best?

hard

A. Use a Table visual with Product Category and Region in Values, Sales in Filters.

B. Use a Matrix visual with Sales in Rows, Product Category in Values, Region in Filters.

C. Use a Matrix visual with Product Category in Rows, Region in Columns, and Sales in Values.

D. Use a Table visual with Region in Rows and Sales in Columns.

Solution

1. Step 1: Identify need for grouping and subtotals

   Showing sales by Product Category and Region with subtotals requires grouping on both dimensions.

2. Step 2: Choose visual and field placement

   Matrix visual supports grouping by Rows and Columns and shows subtotals; place Product Category in Rows, Region in Columns, Sales in Values.

3. Final Answer:

   Use a Matrix visual with Product Category in Rows, Region in Columns, and Sales in Values. -> Option C

4. Quick Check:

   Matrix + Rows + Columns + Values = grouped subtotals [OK]

Hint: Matrix with Rows and Columns fields shows subtotals best [OK]

Common Mistakes:

• Using Table visual which lacks subtotals
• Placing Sales in Filters or wrong areas
• Confusing Rows and Values placement