Postgresql: Database Quick Copy

Postgres' database creation commands allow a new database to be cloned from an existing "template" database, including both the schema and the data. As there is nothing special about a "template" database, you can use any existing database within the same database cluster as the source database. This can be much faster than a dump and load operation. This is done simply by using one of the following commands (copied from the Postgres documentation for your convenience):

To create a database by copying template0, use:
CREATE DATABASE dbname TEMPLATE template0;
from the SQL environment, or:
createdb -T template0 dbname
from the shell.