Problem with Crosstab - Allocating value to wrong column

From: Stefan Schwarzer <stefan(dot)schwarzer(at)unep(dot)org>
To: pgsql-general(at)postgresql(dot)org
Subject: Problem with Crosstab - Allocating value to wrong column
Date: 2010-10-19 10:07:34
Message-ID: 19FF18CF-711F-4FD7-A4AC-C39DDA21C5D8@unep.org
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-general

Hi there,

I have a database with statistical tables which look like this:

id | year_start | value
3 1960 736.1
3 1961 723.3
....
4 1960 123.4

Years can cover 40 years for each of the countries (ID) and each (variable) table .

Now, if for a given year there is no value, expressed not in form of NoData, but as missing line in the table, than I have a problem with this SQL:

SELECT
*
FROM
crosstab( 'SELECT
COALESCE(c.name, '''') AS name,
d.year_start AS year,
d.value AS value
FROM
co2_total_cdiac AS d
RIGHT JOIN
countries_view AS c ON c.id = d.id_country
WHERE
(d.year_start = 1960 OR d.year_start = 2007 )
ORDER BY
1,2;', 3) AS ct (name varchar, y_1960 numeric, y_2007 numeric)

For one of the countries, I have a value for 2007, but not for 1960. When using only the inner query, than I see one line: Andorra - 2007 - 539
But when running the whole SQL, the value for year 2007 get's allocated to the year 1960. The table looks as follows:

name | y_1960 | y_2007
Andorra 539 NULL

(Not sure if the copy/pasted part displays correct:

name y_1960 y_2007
Afghanistan
415
716
Albania
2026
4246
Algeria
6166
140234
Andorra
539
NULL
)

Can anyone give me a hint in which direction to search for a solution?

Thanks a lot!

Stefan

Responses

Browse pgsql-general by date

  From Date Subject
Next Message Andrus 2010-10-19 11:48:30 Re: Optimizing postgresql.conf for dedicated windows server 2003 x64 standard edition
Previous Message Dharmendra Goyal 2010-10-19 09:21:36 Re: install PostgreSQL 9 .0.1 issue using linux binary package .bin