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createdb - create a new PostgreSQL database


createdb [connection-option...] [option...] [dbname [description]]


createdb creates a new PostgreSQL database.

Normally, the database user who executes this command becomes the owner of the new
database. However, a different owner can be specified via the -O option, if the executing
user has appropriate privileges.

createdb is a wrapper around the SQL command CREATE DATABASE (CREATE_DATABASE(7)). There
is no effective difference between creating databases via this utility and via other
methods for accessing the server.


createdb accepts the following command-line arguments:

Specifies the name of the database to be created. The name must be unique among all
PostgreSQL databases in this cluster. The default is to create a database with the
same name as the current system user.

Specifies a comment to be associated with the newly created database.

-D tablespace
Specifies the default tablespace for the database. (This name is processed as a
double-quoted identifier.)

Echo the commands that createdb generates and sends to the server.

-E encoding
Specifies the character encoding scheme to be used in this database. The character
sets supported by the PostgreSQL server are described in Section 22.3.1, “Supported
Character Sets”, in the documentation.

-l locale
Specifies the locale to be used in this database. This is equivalent to specifying
both --lc-collate and --lc-ctype.

Specifies the LC_COLLATE setting to be used in this database.

Specifies the LC_CTYPE setting to be used in this database.

-O owner
Specifies the database user who will own the new database. (This name is processed as
a double-quoted identifier.)

-T template
Specifies the template database from which to build this database. (This name is
processed as a double-quoted identifier.)

Print the createdb version and exit.

Show help about createdb command line arguments, and exit.

The options -D, -l, -E, -O, and -T correspond to options of the underlying SQL command
CREATE DATABASE (CREATE_DATABASE(7)); see there for more information about them.

createdb also accepts the following command-line arguments for connection parameters:

-h host
Specifies the host name of the machine on which the server is running. If the value
begins with a slash, it is used as the directory for the Unix domain socket.

-p port
Specifies the TCP port or the local Unix domain socket file extension on which the
server is listening for connections.

-U username
User name to connect as.

Never issue a password prompt. If the server requires password authentication and a
password is not available by other means such as a .pgpass file, the connection
attempt will fail. This option can be useful in batch jobs and scripts where no user
is present to enter a password.

Force createdb to prompt for a password before connecting to a database.

This option is never essential, since createdb will automatically prompt for a
password if the server demands password authentication. However, createdb will waste a
connection attempt finding out that the server wants a password. In some cases it is
worth typing -W to avoid the extra connection attempt.

Specifies the name of the database to connect to when creating the new database. If
not specified, the postgres database will be used; if that does not exist (or if it is
the name of the new database being created), template1 will be used.


If set, the name of the database to create, unless overridden on the command line.

Default connection parameters. PGUSER also determines the name of the database to
create, if it is not specified on the command line or by PGDATABASE.

This utility, like most other PostgreSQL utilities, also uses the environment variables
supported by libpq (see Section 31.14, “Environment Variables”, in the documentation).


In case of difficulty, see CREATE DATABASE (CREATE_DATABASE(7)) and psql(1) for
discussions of potential problems and error messages. The database server must be running
at the targeted host. Also, any default connection settings and environment variables used
by the libpq front-end library will apply.


To create the database demo using the default database server:

$ createdb demo

To create the database demo using the server on host eden, port 5000, using the LATIN1
encoding scheme with a look at the underlying command:

$ createdb -p 5000 -h eden -E LATIN1 -e demo

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