aws rds delete-db-instance
Deletes a previously provisioned DB instance. AWS CLI reference
4 options Its page in the AWS CLI reference
Options
--db-instance-identifierThe DB instance identifier for the DB instance to be deleted.--delete-automated-backupsSpecifies whether to remove automated backups immediately after the DB instance is deleted.--final-db-snapshot-identifierThe DBSnapshotIdentifier of the new DBSnapshot created when the SkipFinalSnapshot parameter is disabled.--skip-final-snapshotSpecifies whether to skip the creation of a final DB snapshot before deleting the instance.