Обсуждение: Inserting data in a table using sub-selects

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Hi, I'd like to fill one table with the contents of another table. Mye schema
is like this:

CREATE TABLE table1(
id serial NOT NULL PRIMARY KEY,
title varchar NOT NULL,
description varchar
);

CREATE TABLE table2(
id int NOT NULL REFERENCES(table1(id) ON DELETE CASCADE,
content varchar NOT NULL
);

Now - is there a way I can do something like:
INSERT INTO table2(id, content) values (select t1.id, coalesce(t1.title, '')
|| ' ' || coalesce(t1.description, '') as content from table1 t1);

Any hints on how to insert a lot of values at the same time like this?

- --
Andreas Joseph Krogh <andreak@officenet.no>
Managing Director, Senior Software Developer
OfficeNet AS

I always do a CVS update before making a patch (unless I forget).

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On Wed, 10 Mar 2004, Andreas Joseph Krogh wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi, I'd like to fill one table with the contents of another table. Mye schema
> is like this:
>
> CREATE TABLE table1(
> id serial NOT NULL PRIMARY KEY,
> title varchar NOT NULL,
> description varchar
> );
>
> CREATE TABLE table2(
> id int NOT NULL REFERENCES(table1(id) ON DELETE CASCADE,
> content varchar NOT NULL
> );
>
> Now - is there a way I can do something like:
> INSERT INTO table2(id, content) values (select t1.id, coalesce(t1.title, '')
> || ' ' || coalesce(t1.description, '') as content from table1 t1);

I think you mostly just want to remove the values():

Insert into table2(id, content) select t1.id, coalesce(t1.title, '')|| ' ' || coalesce(t1.description, '') as content
fromtable t1;