Create a dataset
Click Create → Dataset in the upper-right corner of your workbook page.
In the Connections section, click + Add and select one of your connections from the list. You will see a list of tables that the Visualization service can visualize in the Tables section.
By default, the table from the connection will automatically appear in the dataset's workspace.
You'll see the preview of the dataset columns in the Preview section below.
(optional) You can drag and drop additional the tables to the workspace on the right to create links between them.
Click Save in the upper-right corner of your dataset page.