So easy to upgrade de dbhome and database. Let’s see the steps below:

[root@techdb01 ~]# dbaascli patch db list --oh `hostname`:/u02/app/oracle/product/12.2.0/dbhome_8
DBAAS CLI version 19.4.4.1.0
Executing command patch db list --oh techdb01.pbh:/u02/app/oracle/product/12.2.0/dbhome_8
INFO : EXACS patching

Available Patches
patchid :29708720 (DB 12.2.0.1.190716 DATABASE RELEASE UPDATE (Jul 2019))
patchid :30116802 (DB 12.2.0.1.191015 DATABASE RELEASE UPDATE (Oct 2019))
patchid :30501932 (DB 12.2.0.1.200114 DATABASE RELEASE UPDATE (Jan 2020))
patchid :30920127 (DB 12.2.0.1.200414 DATABASE RELEASE UPDATE (Apr 2020))

Install database patch using
dbaascli patch db apply --patchid 30920127 --dbnames <>
[root@techdb01 ~]# dbaascli patch db apply --patchid 30920127 --dbnames boston
DBAAS CLI version 19.4.4.1.0
Executing command patch db apply --patchid 30920127 --dbnames boston
INFO : EXACS patching
This might take some time, please take a look at file /var/opt/oracle/log/exadbcpatch/exadbcpatch.log for progress
Patch installation successful
[root@techdb01 ~]#


dbaascli patch db list --oh `hostname`:/u02/app/oracle/product/19.0.0.0/dbhome_4 --dbname boston

dbaascli patch db prereq --patchid 30899722 pdb01:/u02/app/oracle/product/19.0.0.0/dbhome_3 --dbnames boston

Please apply the apply with nohup clause and & at final this will take time:

nohup dbaascli patch db apply --patchid 30899722 
pdb01:/u02/app/oracle/product/19.0.0.0/dbhome_3 --dbnames boston &

check logs for dbaascli - and outputs and ps -ef | grep dbaascli