About Database Connections for Semantic Models
When you use Model Administration Tool to edit your semantic models and upload them to Oracle Analytics Cloud, you can refer to any database connections you define in the Console “by name” in the Connection Pool dialog. You don’t need to re-enter the connection details in Model Administration Tool.
See Connect to a Data Source using a Connection Defined In Console.
You don't have to re-enter database connection information for semantic models pre-built with Oracle Analytics Server.
Connection information for these models is often already defined in the semantic model that you upload to Oracle Analytics Cloud. See About Uploading Semantic Models from Oracle Analytics Server.