From: | Daniel Schuchardt <d(dot)schuchardt(at)prodat-sql(dot)de> |
---|---|
To: | pgsql-general(at)postgresql(dot)org |
Cc: | mmoncure(at)gmail(dot)com |
Subject: | Re: crosstab function - pivot - use column value as column description |
Date: | 2010-01-12 22:42:52 |
Message-ID: | 4B4CFAEC.90004@prodat-sql.de |
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Lists: | pgsql-general |
See bottom.
Am 12.01.2010 22:00, schrieb Merlin Moncure:
> On Tue, Jan 12, 2010 at 3:27 PM, Daniel Schuchardt
> <d(dot)schuchardt(at)prodat-sql(dot)de> wrote:
>
>> Hy,
>>
>> i'm looking for a solution to get this table dynamicaly in that resultset:
>>
>> SELECT r_dbrid, r_kategorie AS column_name, r_descr AS value FROM
>> recnokeyword WHERE r_dbrid=X
>> r_dbrid | r_kategorie | r_descr
>> ----------+-------------+------------
>> 14725737 |material | Alu Sorte1
>> 14725737 |farbe | Blau
>> 14725737 |gewicht | 100 kg
>>
>> ---->
>>
>> material | farbe | gewicht
>> ----------+-------------+------------
>> alu sorte 1|blau | 100kg
>>
>> ----> the number of columns depends on data.
>>
>> is there is a simple solution for that?
>>
> have you ruled out the appropriate contrib module?
>
> http://www.postgresql.org/docs/8.4/static/tablefunc.html
>
> merlin
>
>
yes, but that function requires a return type -> so i has to know how
many columns. also the column description ist defined by data but by
return type.
(
SELECT * FROM crosstab('...', '...')
AS ct(row_name text, extra text, cat1 text, cat2 text, cat3 text, cat4 text);
This will produce a result something like:
<== value columns ==>
row_name extra cat1 cat2 cat3 cat4
)
Daniel
--
Daniel Schuchardt
/Softwareentwicklung/
/http://www.prodat-sql.de/
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