As well as linking between tables in one datasource you can also create links between two different data sources.
In this use case we want to connect the client with their payment history.
This is what our two data sources look like.
Both connected in the app in Setup home.
In the clients table a link has been created with the name of the client from Airtable matching the client column in Google sheets.
You will see the link creation in both tables, but you can only delete the link on the source creation table.
For example, linking Clients name to Plan will not show anything in the table, as the client name in this example does not match anything in plan.