Step 1: Goto data source details page
Step 1.1: Goto data source tab
Step 1.2: Click on the data source to go to the details page
Step 2: Define the join condition
Step 2.1: Click on "Add New Join View"
Step 2.2: Fill in the join condition form
Click on the "Create" button to create the join view.
Step 3: Query on created join view like a normal DingoQL table.