https://docs.oracle.com/en/database/oracle/oracle-database/26/rilin/selecting-dbca-options-to-create-oracle-rac-or-oracle-rac-one-node-databases-with-dbca.html
Use Oracle Database Configuration Assistant (DBCA) in standalone mode to create and delete Oracle Real Application Clusters (Oracle RAC) databases.
oracle raccreatingonenodedatabases
https://www.diretoresbrasil.org/faq
faqdbca