To import objects from the Autonomous Data Warehouse into Oracle Analytics Cloud, click on Create Data Set. Then select the connection you created earlier. If you skipped the step on creating a connection, click on the Create Connection button and follow the screens to create it. Then continue.
https://blogs.perficient.com/2019/07/22/loading-data-into-oracle-autonomous-data-warehouse-using-oac/

https://docs.oracle.com/en-us/iaas/Content/Events/Reference/eventsproducers.htm

Autonomous Data Guard is a feature of Autonomous Database on Shared Infrastructure that provides data protection and disaster recovery for your database by creating and maintaining a standby database that continuously gets updated with the changes from the primary database4. With Autonomous Data Guard enabled, you can perform a switchover or a failover operation to switch roles between the primary and standby databases.A switchover is a planned role reversal that does not affect availability5.A failover is an unplanned role reversal that occurs when the primary database becomes unavailable due to a failure or disaster6.You cannot perform a reinstate operation, which is used to re-synchronize a disabled standby database with the primary database after a failover7.You also cannot change the protection mode, which determines how redo data is transmitted from the primary database to the standby database4.You can only view the apply lag, which is the difference between the redo applied on the standby database and the redo generated on the primary database5.
Use Standby Databases with Autonomous Data Guard for Disaster Recovery - Oracle Help Center.
Switch Roles in an Autonomous Data Guard Configuration - Oracle Help Center.
Fail Over to the Standby in an Autonomous Data Guard Configuration - Oracle Help Center.
Reinstate the Disabled Standby in an Autonomous Data Guard Configuration - Oracle Help Center.

Autonomous Transaction Processing provides all of the performance of the market leading Oracle Database in an environment that is tuned and optimized to meet the demands of a variety of applications, including: mission-critical transaction processing, mixed transactions and analytics, loT, and JSON document store.
As a service Autonomous Transaction Processing does not require database administration. With Autonomous Transaction Processing you do not need to configure or manage any hardware, or install any software. Autonomous Transaction Processing handles creating the database, backing up the database, patching and upgrading the database, and growing or shrinking the database.

Initially, the Role field shows the role None for existing database users. After adding a user the role Developer is assigned to the user.
Use SQL Dev or Client tools
https://docs.oracle.com/en/cloud/paas/autonomous-data-warehouse-cloud/user/manage-users-oml.html#GUID-D928B760-513A-4C6D-9EB7-DF992249A26D