How are sales in 'Art' Sub-Category changing over the years? To answer this question, you create a bar chart that shows annual differences in sales.

In Tableau,

1. Create a data table that shows sales values across sub-categories for various years. Apply table calculations that calculates % differences.

2. Save the Calculation as a measure calling it 'Sales Diff over years'

3. On a new sheet, create a Bar Chart using this new measure over the years. Filter the bar chart to Sub-Category 'Art'.

The resulting bar chart should look like