Re: merge multiple records into 1

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От Bruno Wolff III
Тема Re: merge multiple records into 1
Дата
Msg-id 20030824162230.GA11448@wolff.to
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Ответ на merge multiple records into 1  ("Brian Maguire" <bmaguire@vantage.com>)
Список pgsql-general
On Sat, Aug 23, 2003 at 20:16:51 -0400,
  Brian Maguire <bmaguire@vantage.com> wrote:
> What would be the best way to "flatten" a set of records into one column with a query?
>
> example:
>
> You have a table called tbletters
>
> id letters
> 1      a
> 2      b
> 3      c
> 4      d
>
> So I can return this as one column in one record
>
> a,b,c,d

You could write an aggregate function that concatenates strings. There should
even be examples of some code that does this in the archives from within
the last 6 months.

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