- Open a terminal into your local machine.
- Get hold of credentials of any existing database in your RDS instance.
- Log into the instance with those DB credentials using below command:
psql \ --host=<DB instance endpoint> \ --port=<port> \ --username=<master username> \ --password \ --dbname=<database name>
- Create new database into your existing RDS instance with below command:
CREATE DATABASE <DB name>;