Command option Sample:aws rds describe-orderable-db-instance-options

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Returns a list of orderable DB instance options for the specifiedengine.Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/rds/describe-orderable-db-instance-options.html

aws rds describe-orderable-db-instance-options --engine oracle-ee --db-instance-class db.r4.4xlarge
    New features to reduce and optimize vCPUs on Amazon RDS for Oracle Database | AWS Database Blog : http://aws.amazon.com/blogs/database/new-features-to-reduce-and-optimize-vcpus-on-amazon-rds-for-oracle-data/
aws rds describe-orderable-db-instance-options --engine oracle-ee --engine-version *.*.*.*.v8 --license-model bring-your-own-license --output table
    How do I list all Amazon RDS DB Instance Classes for DB engine oracle-ee using AWS CLI - Stack Overflow : http://stackoverflow.com/questions/45377223/how-do-i-list-all-amazon-rds-db-instance-classes-for-db-engine-oracle-ee-using-a

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