Use this API to add an additionaldata source to an existingdatabase. Theproperties follow thesame structure as the initial schema passed toinitial_data_source[properties] in theCreate a database API, but can be managed independently of theproperties of any sibling data sources.

A standard "table" view is created alongside the new data source. To customize database views, use the Notion app. Managing views is not currently supported in the API.