In oracle lnux 8.0, install postgresql-12, dnf install https://download.postgresql.org/pub/repos/yum/reporpms/EL-8-x86_64/pgdg-redhat-repo-latest.noarch.rpm, then run dnf list postgres*, no postgresql12-server.x86_64 and postgresql12.x86_64 in list. why?
postgresql webpage: https://www.postgresql.org/download/linux/redhat/