Provided by: postgresql-client-9.1_9.1.1-1_i386 bug

NAME

       CREATE_TABLE_AS - define a new table from the results of a query

SYNOPSIS

       CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE table_name
           [ (column_name [, ...] ) ]
           [ WITH ( storage_parameter [= value] [, ... ] ) | WITH OIDS | WITHOUT OIDS ]
           [ ON COMMIT { PRESERVE ROWS | DELETE ROWS | DROP } ]
           [ TABLESPACE tablespace ]
           AS query
           [ WITH [ NO ] DATA ]

DESCRIPTION

       CREATE TABLE AS creates a table and fills it with data computed by a
       SELECT command. The table columns have the names and data types
       associated with the output columns of the SELECT (except that you can
       override the column names by giving an explicit list of new column
       names).

       CREATE TABLE AS bears some resemblance to creating a view, but it is
       really quite different: it creates a new table and evaluates the query
       just once to fill the new table initially. The new table will not track
       subsequent changes to the source tables of the query. In contrast, a
       view re-evaluates its defining SELECT statement whenever it is queried.

PARAMETERS

       GLOBAL or LOCAL
           Ignored for compatibility. Refer to CREATE TABLE (CREATE_TABLE(7))
           for details.

       TEMPORARY or TEMP
           If specified, the table is created as a temporary table. Refer to
           CREATE TABLE (CREATE_TABLE(7)) for details.

       UNLOGGED
           If specified, the table is created as an unlogged table. Refer to
           CREATE TABLE (CREATE_TABLE(7)) for details.

       table_name
           The name (optionally schema-qualified) of the table to be created.

       column_name
           The name of a column in the new table. If column names are not
           provided, they are taken from the output column names of the query.
           If the table is created from an EXECUTE command, a column name list
           cannot be specified.

       WITH ( storage_parameter [= value] [, ... ] )
           This clause specifies optional storage parameters for the new
           table; see Storage Parameters for more information. The WITH clause
           can also include OIDS=TRUE (or just OIDS) to specify that rows of
           the new table should have OIDs (object identifiers) assigned to
           them, or OIDS=FALSE to specify that the rows should not have OIDs.
           See CREATE TABLE (CREATE_TABLE(7)) for more information.

       WITH OIDS, WITHOUT OIDS
           These are obsolescent syntaxes equivalent to WITH (OIDS) and WITH
           (OIDS=FALSE), respectively. If you wish to give both an OIDS
           setting and storage parameters, you must use the WITH ( ... )
           syntax; see above.

       ON COMMIT
           The behavior of temporary tables at the end of a transaction block
           can be controlled using ON COMMIT. The three options are:

           PRESERVE ROWS
               No special action is taken at the ends of transactions. This is
               the default behavior.

           DELETE ROWS
               All rows in the temporary table will be deleted at the end of
               each transaction block. Essentially, an automatic TRUNCATE(7)
               is done at each commit.

           DROP
               The temporary table will be dropped at the end of the current
               transaction block.

       TABLESPACE tablespace
           The tablespace is the name of the tablespace in which the new table
           is to be created. If not specified, default_tablespace is
           consulted, or temp_tablespaces if the table is temporary.

       query
           A SELECT(7), TABLE, or VALUES(7) command, or an EXECUTE(7) command
           that runs a prepared SELECT, TABLE, or VALUES query.

       WITH [ NO ] DATA
           This clause specifies whether or not the data produced by the query
           should be copied into the new table. If not, only the table
           structure is copied. The default is to copy the data.

NOTES

       This command is functionally similar to SELECT INTO (SELECT_INTO(7)),
       but it is preferred since it is less likely to be confused with other
       uses of the SELECT INTO syntax. Furthermore, CREATE TABLE AS offers a
       superset of the functionality offered by SELECT INTO.

       Prior to PostgreSQL 8.0, CREATE TABLE AS always included OIDs in the
       table it created. As of PostgreSQL 8.0, the CREATE TABLE AS command
       allows the user to explicitly specify whether OIDs should be included.
       If the presence of OIDs is not explicitly specified, the
       default_with_oids configuration variable is used. As of PostgreSQL 8.1,
       this variable is false by default, so the default behavior is not
       identical to pre-8.0 releases. Applications that require OIDs in the
       table created by CREATE TABLE AS should explicitly specify WITH (OIDS)
       to ensure proper behavior.

EXAMPLES

       Create a new table films_recent consisting of only recent entries from
       the table films:

           CREATE TABLE films_recent AS
             SELECT * FROM films WHERE date_prod >= '2002-01-01';

       To copy a table completely, the short form using the TABLE command can
       also be used:

           CREATE TABLE films2 AS
             TABLE films;

       Create a new temporary table films_recent, consisting of only recent
       entries from the table films, using a prepared statement. The new table
       has OIDs and will be dropped at commit:

           PREPARE recentfilms(date) AS
             SELECT * FROM films WHERE date_prod > $1;
           CREATE TEMP TABLE films_recent WITH (OIDS) ON COMMIT DROP AS
             EXECUTE recentfilms('2002-01-01');

COMPATIBILITY

       CREATE TABLE AS conforms to the SQL standard. The following are
       nonstandard extensions:

       o   The standard requires parentheses around the subquery clause; in
           PostgreSQL, these parentheses are optional.

       o   In the standard, the WITH [ NO ] DATA clause is required; in
           PostgreSQL it is optional.

       o   PostgreSQL handles temporary tables in a way rather different from
           the standard; see CREATE TABLE (CREATE_TABLE(7)) for details.

       o   The WITH clause is a PostgreSQL extension; neither storage
           parameters nor OIDs are in the standard.

       o   The PostgreSQL concept of tablespaces is not part of the standard.
           Hence, the clause TABLESPACE is an extension.

SEE ALSO

       CREATE TABLE (CREATE_TABLE(7)), EXECUTE(7), SELECT(7), SELECT INTO
       (SELECT_INTO(7)), VALUES(7)