CREATE DATABASE(7)                                        SQL Commands                                        CREATE DATABASE(7)



NAME
       CREATE DATABASE - create a new database


SYNOPSIS
       CREATE DATABASE name
           [ [ WITH ] [ OWNER [=] dbowner ]
                  [ TEMPLATE [=] template ]
                  [ ENCODING [=] encoding ]
                  [ LC_COLLATE [=] lc_collate ]
                  [ LC_CTYPE [=] lc_ctype ]
                  [ TABLESPACE [=] tablespace ]
                  [ CONNECTION LIMIT [=] connlimit ] ]


DESCRIPTION
       CREATE DATABASE creates a new PostgreSQL database.

       To create a database, you must be a superuser or have the special CREATEDB privilege.  See CREATE USER [create_user(7)].

       Normally,  the  creator  becomes the owner of the new database.  Superusers can create databases owned by other users, by
       using the OWNER clause. They can even create databases owned by users with no  special  privileges.  Non-superusers  with
       CREATEDB privilege can only create databases owned by themselves.

       By  default, the new database will be created by cloning the standard system database template1. A different template can
       be specified by writing TEMPLATE name. In particular, by writing TEMPLATE template0, you can  create  a  virgin  database
       containing  only the standard objects predefined by your version of PostgreSQL. This is useful if you wish to avoid copy-
       ing any installation-local objects that might have been added to template1.

PARAMETERS
       name   The name of a database to create.

       dbowner
              The name of the database user who will own the new database, or DEFAULT to use the default (namely, the user  exe-
              cuting the command).

       template
              The  name  of  the  template  from  which to create the new database, or DEFAULT to use the default template (tem-
              plate1).

       encoding
              Character set encoding to use in the new database. Specify a string constant (e.g., 'SQL_ASCII'),  or  an  integer
              encoding number, or DEFAULT to use the default encoding (namely, the encoding of the template database). The char-
              acter sets supported by the PostgreSQL server are described in in the  documentation.  See  below  for  additional
              restrictions.

       lc_collate
              Collation  order (LC_COLLATE) to use in the new database.  This affects the sort order applied to strings, e.g. in
              queries with ORDER BY, as well as the order used in indexes on text columns.  The default is to use the  collation
              order of the template database.  See below for additional restrictions.

       lc_ctype
              Character  classification  (LC_CTYPE)  to  use in the new database. This affects the categorization of characters,
              e.g. lower, upper and digit. The default is to use the character classification  of  the  template  database.  See
              below for additional restrictions.

       tablespace
              The  name  of  the  tablespace that will be associated with the new database, or DEFAULT to use the template data-
              base's tablespace. This tablespace will be the default tablespace used for objects created in this  database.  See
              CREATE TABLESPACE [create_tablespace(7)] for more information.

       connlimit
              How many concurrent connections can be made to this database. -1 (the default) means no limit.

       Optional parameters can be written in any order, not only the order illustrated above.

NOTES
       CREATE DATABASE cannot be executed inside a transaction block.

       Errors  along the line of ``could not initialize database directory'' are most likely related to insufficient permissions
       on the data directory, a full disk, or other file system problems.

       Use DROP DATABASE [drop_database(7)] to remove a database.

       The program createdb [createdb(1)] is a wrapper program around this command, provided for convenience.

       Although it is possible to copy a database other than template1 by specifying its name as the template, this is not (yet)
       intended as a general-purpose ``COPY DATABASE'' facility.  The principal limitation is that no other sessions can be con-
       nected to the template database while it is being copied. CREATE DATABASE will fail if any other connection  exists  when
       it  starts;  otherwise,  new connections to the template database are locked out until CREATE DATABASE completes.  See in
       the documentation for more information.

       The character set encoding specified for the new database must be compatible with the chosen locale settings  (LC_COLLATE
       and  LC_CTYPE). If the locale is C (or equivalently POSIX), then all encodings are allowed, but for other locale settings
       there is only one encoding that will work properly.  (On Windows, however, UTF-8 encoding can be used with  any  locale.)
       CREATE DATABASE will allow superusers to specify SQL_ASCII encoding regardless of the locale settings, but this choice is
       deprecated and may result in misbehavior of character-string functions if data that is not encoding-compatible  with  the
       locale is stored in the database.

       The  encoding  and  locale settings must match those of the template database, except when template0 is used as template.
       This is because other databases might contain data that does not match the specified encoding, or might  contain  indexes
       whose  sort ordering is affected by LC_COLLATE and LC_CTYPE. Copying such data would result in a database that is corrupt
       according to the new settings.  template0, however, is known to not contain any data or indexes that would be affected.

       The CONNECTION LIMIT option is only enforced approximately; if two new sessions start at about the same  time  when  just
       one  connection  ``slot''  remains  for the database, it is possible that both will fail. Also, the limit is not enforced
       against superusers.

EXAMPLES
       To create a new database:

       CREATE DATABASE lusiadas;


       To create a database sales owned by user salesapp with a default tablespace of salesspace:

       CREATE DATABASE sales OWNER salesapp TABLESPACE salesspace;


       To create a database music which supports the ISO-8859-1 character set:

       CREATE DATABASE music ENCODING 'LATIN1' TEMPLATE template0;

       In this example, the TEMPLATE template0 clause would only be required if template1's encoding is  not  ISO-8859-1.   Note
       that changing encoding might require selecting new LC_COLLATE and LC_CTYPE settings as well.

COMPATIBILITY
       There is no CREATE DATABASE statement in the SQL standard. Databases are equivalent to catalogs, whose creation is imple-
       mentation-defined.

SEE ALSO
       ALTER DATABASE [alter_database(7)], DROP DATABASE [drop_database(7)]



SQL - Language Statements                                  2011-09-22                                         CREATE DATABASE(7)