We can upgrade an oracle database using OEM 12c cloud control also. Here I will show how to upgrade database from 12.1.0.1 to 12.1.0.2 . Note – Make sure that 12.1.0.2 ORACLE_HOME is installed. SOURCE ORACLE_HOME(12.1.0.1) – /oracle/app/oracle/product/12.1.0 TARGET ORACLE_HOME(12.1.0.2)  – /oracle/app/oracle/product/12.1.0.2_CRM/dbhome_1 Enable Flashback: Before starting the upgrade, Enable flashback in the database, so that we can create a restore point during the upgrade, And if upgrade fails, we will be able to restore the database to before upgrade stage. SQL> alter system set db_recovery_file_dest_size=10G scope=both; System altered. SQL> alter system set db_recovery_file_dest=’/archive/oradata/B2BCRMT3/arch/FRA’ scope=both; SQL> alter database flashback on; Database altered Go to the HOMEPAGE of the database, which need to be upgraded. ORACLE DATABASE -> PROVISIONING – > UPGRADE DATABASE Provide sys password and select the NEW ORACLE_HOME : This step will do the precheck . Please take necessary action for the Validation results and retry the precheck. As precheck is cleared, lets proceed with upgrade settings 1. DEGREE OF UPGRADE PARALLELISM – 4 2. DIAGNOSTIC DESTINATION – /oracle/app/oraclec 3. AUDIT_FILE_DEST=/oracle/app/oracle/admin/B2BCRMD1/adump 4. In Backup Restore section, select Use of guarantee restore point 5. De-select compilation of invalid object , as we will run utlrp.sql, once upgrade is completed. We can start the upgrade Immediately or schedule it for Later. Submit the upgrade job Monitor the upgrade job : Upgrade has been completed succcessfully. Now run utlrp.sql script to compile all the object @$ORACLE_HOME/rdbms/admin/utlrp.sql SEE ALSO: Upgrade database from 11g to 12c manually