Re: Combining several rows

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Hi,

> I would like to combine the contents of several rows of a subquery. After
> several hours of search in the documentation and the internet I didn'T find
> a solution and hope anyone can help. My problem:

You have to create your own aggreate.
You can use this one:

- ---------------------------------------------------
CREATE OR REPLACE FUNCTION
join_sep ( text, text, text )
RETURNS text
LANGUAGE 'sql'
IMMUTABLE
AS '
SELECT CASE
WHEN $1 IS NULL THEN $3
ELSE $1 || $2 || $3
END;
';
- ---------------------------------------------------
CREATE OR REPLACE FUNCTION
join_text ( text, text )
RETURNS text
LANGUAGE 'sql'
AS '
SELECT join_sep($1,'', '',$2);
';
- ---------------------------------------------------
CREATE AGGREGATE join (
BASETYPE = text,
SFUNC = join_text,
STYPE = text
);

Mit freundlichem Gruß / With kind regards
Holger Klawitter
- --
lists <at> klawitter <dot> de
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