Un-merge row headers Tableau

Option 1

Open Tableau Desktop and connect to Superstore sample data.
Drag the Category and Sub-Category dimensions to the Rows shelf.
Double-click Sales in the Measures pane.
Ctrl-click Category and Sub-Category in Dimensions, right-click the highlighted fields, and then select Create > Combined Field.
Drag the combined Category & Sub-Category field to the far left on Rows.
Right-click Category & Sub-Category on Rows, and then clear Show Header.

Option 2

Open Tableau Desktop and connect to Superstore sample data.
Drag the Category and Sub-Category dimensions to the Rows shelf.
Double-click Sales in the Measures pane.
Click Analysis > Create Calculated field...
Name the calculated field, enter the following formula and click OK:
```
[Categories]+[Sub-categories]
```
Drag the new calculated field to the far left on Rows.
Right-click Category & Sub-Category on Rows, and then clear Show Header.

Note: The combined field must produce a unique value for each row in order to repeat the header in every row.

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