Summary: This tutorial will show you an example of adding a MySQL Database to a Workflow.
Step 0: Deactivate the Frontend if your Workflow is connected to it
Step 1: Goto Workflow
Goto Workflow in the main menu.
Step 2: Select your Workflow and open it
Step 3: Press "Add Datasource" Button
Step 4: Select your Data Source and add the credentials
Step 5: Test the connection
Step 6: Save the Data Source
Step 7: Select the database (if applicable)
Congratulations, you have now added a data source. Now you can add add tables (for relational DBs). See our article on adding a table.