# Upgrading the RDS for Oracle DB engine
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When Amazon RDS supports a new version of Oracle Database, you can upgrade your DB instances to the new version. For information about which Oracle versions are available on Amazon RDS, see [*Amazon RDS for Oracle Release Notes*](https://docs.aws.amazon.com/AmazonRDS/latest/OracleReleaseNotes/Welcome.html).

**Important**  
RDS for Oracle Databases 11g, 12c, and 18c are no longer supported. If you maintain Oracle Database 11g, 12c, or 18c snapshots, you can upgrade them to a later release. For more information, see [Upgrading an Oracle DB snapshot](USER_UpgradeDBSnapshot.Oracle.md).

**Topics**
+ [Overview of RDS for Oracle engine upgrades](USER_UpgradeDBInstance.Oracle.Overview.md)
+ [Oracle major version upgrades](USER_UpgradeDBInstance.Oracle.Major.md)
+ [Oracle minor version upgrades](USER_UpgradeDBInstance.Oracle.Minor.md)
+ [Considerations for Oracle database upgrades](USER_UpgradeDBInstance.Oracle.OGPG.md)
+ [Testing an Oracle DB upgrade](USER_UpgradeDBInstance.Oracle.UpgradeTesting.md)
+ [Upgrading the version of an RDS for Oracle DB instance](USER_UpgradeDBInstance.Oracle.Upgrading.md)
+ [Upgrading an Oracle DB snapshot](USER_UpgradeDBSnapshot.Oracle.md)
+ [Preparing for Oracle Database 21c end of support](USER_UpgradeDBInstance.Oracle.21c-end-of-support.md)

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for Amazon RDS. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query AmazonRDS` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).