Oracle rac database upgrade from 11g to 12c manually

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How to Upgrade Database From 11g To 12c Manually · 1. Shutdown immediate; · 2. set ORACLE_HOME to 11g · 3. Start up mount ( with the 11g spfile) · 4. select * from When you are using the DBUA or performing a manual upgrade, you will need both versions of the If this database is the only one using the 11g listener, Backup Database : · Compile Invalid objects if there are any: · Check Network Access Control List: · Database Link from earlier release: · Verify That Materialized1. SQL>@/apps/oracle/cfgtoollogs/PROD/preupgrade/postupgrade_fixup. · 2. Change the ORACLE_HOME to 12c in listener. · 3. Uncomment the crontab · 4.Enable the jobs