 |
Index for Section TABLE |
|
 |
Alphabetical listing for C |
|
 |
Bottom of page |
|
CREATE
NAME
CREATE TABLE AS - create a new table from the results of a query
SYNOPSIS
CREATE [ [ LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name [ (column_name [, ...] ) ]
AS query
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
the underlying SELECT statements whenever it is queried.
PARAMETERS
[LOCAL] TEMPORARY or [LOCAL] TEMP
If specified, the table is created as a temporary table. Temporary
tables are automatically dropped at the end of a session. Existing
persistent tables with the same name are not visible to the current
session while the temporary table exists. Any indexes created on a
temporary table are automatically temporary as well.
The LOCAL word is optional.
table_name
The name of the new table to be created. This table must not already
exist. However, a temporary table can be created that has the same
name as an existing permanent table.
column_name
The name of a column in the new table. Multiple column names can be
specified using a comma-delimited list of column names. If column
names are not provided, they are taken from the output column names of
the query.
query
A query statement (that is, a SELECT command). Refer to select(5) for
a description of the allowed syntax.
DIAGNOSTICS
Refer to create_table(5) and select(5) for a summary of possible output
messages.
NOTES
This command is functionally equivalent to select_into(5), but it is
preferred since it is less likely to be confused with other uses of the
SELECT ... INTO syntax.
COMPATIBILITY
This command is modeled after an Oracle feature. There is no command with
equivalent functionality in SQL92 or SQL99. However, a combination of
CREATE TABLE and INSERT ... SELECT can accomplish the same thing with
little more effort.
HISTORY
The CREATE TABLE AS command has been available since PostgreSQL 6.3.
SEE ALSO
create_table(5), create_view(l), select(l), select_into(l)
 |
Index for Section TABLE |
|
 |
Alphabetical listing for C |
|
 |
Top of page |
|