Upgrade in Place from Oracle Database 11.2.0.4 or 12.1.0.2 to 19c

Follow instructions in the Oracle Database Upgrade Guide - 19c at https://docs.oracle.com/en/database/oracle/oracle-database/19/upgrd/ using the Database Upgrade Assistant (DBUA) option.

For more information, see Method 1 in the Upgrade and Migrate to Oracle Database 19c White Paper at https://www.oracle.com/a/tech/docs/twp-upgrade-oracle-database-19c.pdf.