The Denodo Platform provides real-time integration to any database and enables to create virtual database at the Virtual DataPort layer, but it does not store any data of the view (table) other then data source connection details. When you execute the view, Virtual DataPort Server will connect and obtain the result in real time from the underlying data source. Ensure that, you are connected to the underlying data source while executing the view.
For more details. you can refer to the [Introduction](https://community.denodo.com/docs/html/browse/7.0/platform/installation/introduction/introduction#introduction) section of the Denodo Platform Installation Guide.
Hope this helps!