Custom table calculation scope in Tableau - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the scope of the table calculation to the entire table.

Tableau

WINDOW_SUM(SUM([Sales]), [1])

Drag options to blanks, or click blank then click option'

AFIRST()

BLAST()

C0, 0

D0, LAST()

Attempts:

3 left

💡 Hint

Common Mistakes

Using only FIRST() or LAST() without a range.

Using incorrect syntax like a single number.

The correct syntax to specify the scope from the first to the last row is 0, LAST(). This tells Tableau to compute the sum over the entire table.

2fill in blank

medium

Complete the code to set the partitioning of the table calculation by the [Region] field.

Tableau

WINDOW_AVG(SUM([Profit])) [1] [Region]

Drag options to blanks, or click blank then click option'

APARTITION BY

BORDER BY

CGROUP BY

DFILTER BY

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing partitioning with ordering or grouping.

Using SQL keywords that don't apply here.

In Tableau, PARTITION BY is used to define the scope or partition for table calculations, such as by [Region].

3fill in blank

hard

Fix the error in the table calculation to correctly compute the running total across [Category].

Tableau

RUNNING_SUM(SUM([Sales])) OVER ([1])

Drag options to blanks, or click blank then click option'

AORDER BY [Category]

BPARTITION BY [Category]

CGROUP BY [Category]

DFILTER BY [Category]

Attempts:

3 left

💡 Hint

Common Mistakes

Using PARTITION BY instead of ORDER BY for running totals.

Using GROUP BY or FILTER BY which are invalid here.

For running totals, you need to order the data by the field, so ORDER BY [Category] is correct.

4fill in blank

hard

Fill both blanks to calculate the percent of total sales within each [Region] partition.

Tableau

SUM([Sales]) / WINDOW_SUM(SUM([Sales]) [1] [2])

Drag options to blanks, or click blank then click option'

APARTITION BY

BORDER BY

C0, LAST()

DFIRST(), LAST()

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing ORDER BY with partitioning.

Using incorrect window range values.

The calculation partitions by [Region] and sums over the full window from the first to last row (0, LAST()) to get the total sales per region.

5fill in blank

hard

Fill all three blanks to compute the difference from the previous row in [Sales] ordered by [Date] within each [Category].

Tableau

SUM([Sales]) - LOOKUP(SUM([Sales]), [1]) [2] [Date] [3] [Category]

Drag options to blanks, or click blank then click option'

A-1

BORDER BY

CPARTITION BY

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using offset 0 instead of -1.

Confusing ORDER BY and PARTITION BY placement.

The LOOKUP function uses offset -1 to get the previous row. The calculation orders by [Date] and partitions by [Category] to compute the difference correctly.

Practice

1. What does the Custom Table Calculation Scope control in Tableau?

easy

A. Which data points are included in the calculation

B. The color scheme of the visualization

C. The font size of labels

D. The data source connection type

Solution

1. Step 1: Understand the purpose of table calculation scope

   The scope defines which data points Tableau uses when performing calculations like running totals or rankings.

2. Step 2: Identify what is controlled by scope

   It controls the subset of data included in the calculation, not visual formatting or data source settings.

3. Final Answer:

   Which data points are included in the calculation -> Option A

4. Quick Check:

   Scope controls data points included [OK]

Hint: Scope means which data points calculation uses [OK]

Common Mistakes:

• Confusing scope with visual formatting
• Thinking scope changes data source
• Mixing scope with filter settings

2. Which option correctly sets the scope of a table calculation to compute using only the Region dimension in Tableau?

easy

A. Compute Using > Pane (Across)

B. Compute Using > Table (Down)

C. Compute Using > Region

D. Compute Using > Table (Across)

Solution

1. Step 1: Identify the dimension to set scope

   To limit calculation to the Region dimension, select Compute Using > Region.

2. Step 2: Understand Compute Using options

   Options like Table (Down) or Table (Across) use the entire table direction, not a specific dimension.

3. Final Answer:

   Compute Using > Region -> Option C

4. Quick Check:

   Compute Using dimension name sets scope [OK]

Hint: Choose dimension name under Compute Using for scope [OK]

Common Mistakes:

• Selecting Table (Down) instead of dimension
• Confusing Pane with Table scope
• Not selecting specific dimension

3. Given a sales table with dimensions Region and Category, what will be the result of a running total table calculation with scope set to Compute Using: Category for Region 'West'?

medium

A. Running total sums all data ignoring Region and Category

B. Running total resets for each Category within the West region

C. Running total resets for each Region ignoring Category

D. Running total sums all Categories across all Regions

Solution

1. Step 1: Understand scope set to Category

   Compute Using Category means the running total computes along the Category dimension, restarting (partitioned) by other dimensions like Region.

2. Step 2: Consider Region filter 'West'

   Filtered to West, the running total resets for each Category within the West region.

3. Final Answer:

   Running total resets for each Category within the West region -> Option B

4. Quick Check:

   Compute Using Category: along Category, reset by Region [OK]

Hint: Compute Using sets addressing (along), partition sets reset [OK]

Common Mistakes:

• Thinking running total sums all regions
• Ignoring filter on Region
• Confusing scope with partitioning

4. You set a table calculation to Compute Using: Table (Across) but the running total is incorrect. What is the most likely cause?

medium

A. The table calculation is not enabled

B. The calculation is missing a filter

C. The data source is not connected

D. The data is arranged vertically, but scope is set horizontally

Solution

1. Step 1: Analyze Compute Using Table (Across)

   This scope computes calculation across columns (horizontally).

2. Step 2: Check data arrangement

   If data is arranged vertically (down rows), computing across columns causes incorrect results.

3. Final Answer:

   The data is arranged vertically, but scope is set horizontally -> Option D

4. Quick Check:

   Scope direction must match data layout [OK]

Hint: Match Compute Using direction to data layout [OK]

Common Mistakes:

• Ignoring data layout when setting scope
• Assuming filters cause running total errors
• Thinking data source connection affects calculation

5. You want to create a running total of sales that restarts for each Region and sums across Category. Which custom table calculation scope should you use?

hard

A. Compute Using: Category, Restarting every Region

B. Compute Using: Region, Restarting every Category

C. Compute Using: Table (Down)

D. Compute Using: Pane (Across)

Solution

1. Step 1: Understand requirement

   Running total should sum across Category but restart for each Region.

2. Step 2: Set scope to Category and partition by Region

   Setting Compute Using to Category calculates running total across categories. Restarting every Region means partitioning by Region.

3. Step 3: Confirm other options

   Other options do not correctly partition or compute as required.

4. Final Answer:

   Compute Using: Category, Restarting every Region -> Option A

5. Quick Check:

   Scope by Category with restart per Region [OK]

Hint: Compute Using dimension to sum, partition to restart [OK]

Common Mistakes:

• Confusing which dimension to compute using
• Not setting restart partition correctly
• Using Table (Down) which sums entire table