21c, 19c (all releases)

Direct upgrade is supported. Perform the upgrade using the current Oracle Database Upgrade Guide, which is this guide.

18c

12.2

12.1.0.2.

12.1.0.1

11.2.0.1, 11.2.0.2, 11.2.0.3, 11.2.0.4

11.1.0.6, 11.1.0.7

10.2 or earlier releases

Direct upgrade to Oracle Database 23c is not supported.

Solution: Upgrade to an intermediate Oracle Database release that can be directly upgraded to the current release. Upgrade Oracle Database releases that are not supported for direct upgrade in this release to an intermediate Oracle Database release that is supported for direct upgrade.

When upgrading to an intermediate Oracle Database release, follow the instructions in the intermediate release documentation, including running the preupgrade scripts for that intermediate release. After you complete an upgrade to the intermediate release Oracle Database, you can upgrade the intermediate release database to the current Oracle Database release.

This restriction does not apply if you use Oracle Data Pump export/import to migrate data to the new release.

For example:

• Releases 12.2.0.1, 12.2.0.2. 12.2.0.3, 12.2.0.4, 18c: Upgrade to Oracle Database 21c, and then upgrade to Oracle Database 23c.

• Releases 12.1.0.1, 12.1.0.2, 11.2.0.3, 11.2.0.4: Upgrade to Oracle Database 12c Release 2 (12.2), upgrade to Oracle Database 21c, and then upgrade to Oracle Database 23c.

Note: Always update to the most recent intermediate release to which you can upgrade directly. Your case can be different from that of the examples provided here.

​18 (all releases), 12.2.0.1, 12.1.0.2, 11.2.0.4

Direct upgrade is supported. Perform the upgrade using the current Oracle Database Upgrade Guide, which is this guide.

12.1.0.1

11.2.0.1, 11.2.0.2, 11.2.0.3

11.1.0.6, 11.1.0.7

10.2 or earlier releases

Direct upgrade to Oracle Database 19c is not supported.

Solution: Upgrade to an intermediate Oracle Database release that can be directly upgraded to the current release. Upgrade Oracle Database releases that are not supported for direct upgrade in this release to an intermediate Oracle Database release that is supported for direct upgrade.

When upgrading to an intermediate Oracle Database release, follow the instructions in the intermediate release documentation, including running the preupgrade scripts for that intermediate release. After you complete an upgrade to the intermediate release Oracle Database, you can upgrade the intermediate release database to the current Oracle Database release.

This restriction does not apply if you use Oracle Data Pump export/import to migrate data to the new release.

For example:

• If you are upgrading from release 11.2.0.2 or 11.1.0.7, then you must first upgrade to the terminal patch set release for Oracle Database 11g release 2 (11.2.0.4), which is supported for direct upgrade to Oracle Database 19c.

• If you are upgrading from release 10.2.0.2, 10.2.0.3, 10.2.0.4,10.2.0.5 or 10.1.0.5, then you must first upgrade to release 11.2. or 12.1

• If you are upgrading from release 9.2.0.8, then you must first upgrade to a sequence of intermediate Oracle Database releases:

  Upgrade from release 9.2.0.8 to release 11.2.0.4. Then upgrade from release 11.2 to 19c

  Note: Always update to the most recent intermediate release to which you can upgrade directly. Your case can be different from that of the examples provided here.