db
Parameters
value
A DB subnet group to associate with the DB instance. If you update this value, the new subnet group must be a subnet group in a new VPC. If there's no DB subnet group, then the DB instance isn't a VPC DB instance. For more information about using Amazon RDS in a VPC, see Using Amazon RDS with Amazon Virtual Private Cloud (VPC) in the Amazon RDS User Guide. Amazon Aurora Not applicable. The DB subnet group is managed by the DB cluster. If specified, the setting must match the DB cluster setting.