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Learning Tableau 2022
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We’ve seen parameters in Tableau Desktop. Parameters in Tableau Prep are very similar and are capable of being used to control the input, output, and logic within a flow.
Let’s say for example that you wanted to create a parameter that indicated whether the dataset was test or production data. Depending on the value, you might change aspects of the data in the flow or even output to a different location.
To create or manage parameters in Tableau Prep Builder, use the Parameters button on the toolbar:
Figure 16.49: Clicking the Parameters button on the toolbar reveals the option to create a parameter or manage any existing parameters
Once you have clicked Create Parameter, you will see another window with all the options for your new parameter:
Figure 16.50: Creating a new parameter
You’ll find much is very similar to creating a parameter in Tableau Desktop. You can give the parameter a...