From the course: Low Code/No-Code Data Literacy with KNIME: From Basic to Advanced
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Flow variables in KNIME Analytics Platform: Concept and application - KNIME Tutorial
From the course: Low Code/No-Code Data Literacy with KNIME: From Basic to Advanced
Flow variables in KNIME Analytics Platform: Concept and application
(calm music) - In this video, you will learn what a flow variable is and how to create and use it. Let's look into that. In this workflow, we read in some sales data, filter the entries for Germany, calculate the total revenue, and finally, rename the Total Revenue column to Germany. This workflow works fine for the country of Germany. However, if you want to obtain the same table for the USA, you need to change the configuration of both the Row Filter and the Column Renamer nodes. This is a simple workflow, but if you had a more complex workflow with more nodes and settings to update, it would be inefficient and error prone to reconfigure it manually. This is exactly where you need flow variables. A flow variable is a parameter in a KNIME workflow to overwrite a node's configuration settings. In our example, you can control a node's settings configuring the country with a parameter, flow variable, to execute the workflow for different countries without manually changing the settings.…
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