Oracle Siebel CRM can run on the Oracle, MSSQL, or IBM DB2 databases. You can use Airbyte to sync your Oracle Siebel CRM instance by connecting to the underlying database using the appropriate Airbyte connector:
Reach out to your service representative or system admin to find the parameters required to connect to the underlying database
To understand your Oracle Siebel CRM database schema, see the Organization Setup Overview docs documentation. Otherwise, the schema will be loaded according to the rules of the underlying database's connector.