PostgreSQL Concepts
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Internal
Database
A PostgresSQL usually comes with 4 pre-existing databases (admin, postgres, template0, template1). "postgres" is fit for general use and it should be used by default.
Schema
Each database has by default a public schema.
Tablespace
Authentication
User
Users are shared across databases.
The "user" concept is equivalent with the "role" concept. They mean the same thing.
Role
The "role" concept is equivalent with the "user" concept. They mean the same thing.
Role Attributes
A specific role may:
- be a superuser
- create another role
- create a database