In order to create a database, the PostgreSQL server must be up and running (see Section 18.3).
Databases are created with the SQL command CREATE DATABASE:
name follows the
usual rules for SQL identifiers.
The current role automatically becomes the owner of the new
database. It is the privilege of the owner of a database to remove
it later (which also removes all the objects in it, even if they
have a different owner).
The creation of databases is a restricted operation. See Section 21.2 for how to grant permission.
Since you need to be connected to the database server in order
to execute the
command, the question remains how the first database at any given site can be
created. The first database is always created by the
initdb command when the data storage area is
initialized. (See Section 18.2.)
This database is called
postgres. So to create the first “ordinary” database you
can connect to
A second database,
template1, is also created during
database cluster initialization. Whenever a new database is created
within the cluster,
essentially cloned. This means that any changes you make in
template1 are propagated to all
subsequently created databases. Because of this, avoid creating
template1 unless you want
them propagated to every newly created database. More details
appear in Section 22.3.
createdb does no magic. It connects
postgres database and issues
CREATE DATABASE command, exactly
as described above. The createdb reference page contains
the invocation details. Note that
createdb without any arguments will create a
database with the current user name.
Chapter 20 contains information about how to restrict who can connect to a given database.
Sometimes you want to create a database for someone else, and have them become the owner of the new database, so they can configure and manage it themselves. To achieve that, use one of the following commands:
from the SQL environment, or:
from the shell. Only the superuser is allowed to create a database for someone else (that is, for a role you are not a member of).
If you see anything in the documentation that is not correct, does not match your experience with the particular feature or requires further clarification, please use this form to report a documentation issue.