Re: Populating an array from a select statement

am  Mon, dem 18.02.2008, um  8:22:14 -0500 mailte John Gunther folgendes:
> What's the most straightforward way to populate an array from a select
> statement? For example, using a fictional extension of SQL syntax, I'd like:
>
> update users set emails=ARRAY[select email from address where userid=25]
> where id=25;
>
> So if user 25  has emails john@domain.com, john@gmail.com, and
> john@yahoo.com in the address table,
> select emails from user where id=25;
> will return:
>                                          emails
> ----------------------------------------------------------------
> {john@domain.com, john@gmail.com, and john@yahoo.com}

You can use array_to_string() and array().

Example:

test=*# select * from mail_adr ;
 id |     email
----+---------------
  2 | foo@bar
  2 | bar@batz
  2 | foobar@barfoo
(3 rows)

test=*# select array_to_string(array(select email from mail_Adr where id=2), ', ');
         array_to_string
----------------------------------
 foo@bar, bar@batz, foobar@barfoo
(1 row)


Andreas
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Andreas Kretschmer
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