In general, ODBC will connect to a database using a driver to make the connection. For learning more information about the ODBC connection, I would look at the section[ ODBC sources](https://community.denodo.com/docs/html/browse/8.0/en/vdp/administration/creating_data_sources_and_base_views/odbc_sources/odbc_sources#odbc-sources) in the Virtual Dataport Administration Guide. RESTful services will involve using the URL to get specific information since it is an API. For information about [RESTful web services](https://community.denodo.com/docs/html/browse/8.0/en/vdp/administration/restful_architecture/restful_web_service/restful_web_service), I would refer to the RESTful Web Service section in the Virtual Dataport Administration Guide. For clarification on formats, please refer to the [Representations](https://community.denodo.com/docs/html/browse/8.0/en/vdp/administration/restful_architecture/restful_web_service/representations) section of VDP Admin Guide. There is also a section called [Advanced Querying](https://community.denodo.com/docs/html/browse/8.0/en/vdp/administration/restful_architecture/odata4_service/odata4_service_querying_data_advanced) which discusses filtering with RESTful web services more in depth which would be helpful.
Hope this Helps!