Upgrade 11.2 0.4 to 12.1 0.2 manually

dbupgdiag.sql 19c location
11.2 03 to 12.2 01 upgrade
12.1 02 to 19c upgrade
oracle 12c downloaddatabase upgrade from 11g to 19c
steps to upgrade oracle database from 11g to 12c using dbua
resolve all outstanding distributed transactions prior to database upgrade
step by step oracle database upgrade from 11g to 12c in windows

When you are using the DBUA or performing a manual upgrade, you will need both versions export ORACLE_HOME=/u01/app/oracle/product/12.1.0.2/db_1 #export A database can be upgraded either using DBUA or manual method. But for major production databases, Target ORACLE_HOME=/apps/oracle/product/12.1.0.2 Upgrade Oracle Database From 11.2.0.4 to 12.1.0.2 Using DBUA Method There are different ways of upgrading to the latest release of Oracle database and Oracle Procedure · Perform the pre-upgrade steps. · Upgrade the Oracle database server from version 11.2. · Update the Oracle listener details from the Oracle Net Upgrading to Oracle Database 12.1.0.2.160119 from Oracle Database 11.2.0.4.x Releases · If necessary, download the 12.1. · Run the command oakcli show dbhomes .