If the Postgres postmaster is up and running we can create some databases to experiment with. Here, we describe the basic commands for managing a database.
Let's say you want to create a database named mydb. You can do this with the following command:
% createdb dbname
Postgres allows you to
create any number of databases at a given site and you
automatically become the database administrator of the database you
just created. Database names must have an alphabetic first
character and are limited to 16 characters in length. Not every
user has authorization to become a database administrator. If
Postgres refuses to create
databases for you, then the site administrator needs to grant you
permission to create databases. Consult your site administrator if
this occurs.