Hi there,
I run an aggregation on national statistics to retrieve regional values (for Africa, Europe, ...). Now, I want to have a global aggregation as well. The easiest thing for my PHP/HTML procedure would be to have the global row make appear within the regional result. So it would be something like
name | y_2001 | y_2002 .....
--------------------------------------------------------
Africa | 2323 | 342323
Europe | ....
.....
Global | 849309 | .....
The global total can be derived by for example be letting out the COALESCE and GROUP BY r.name parameters in the SQL below and using UNION ALL to attach this then as second query. But then, there is one column less - the one for the regional name.
SELECT * FROM crosstab( '
SELECT
COALESCE(r.name, ''''),
year_start AS year,
SUM(value) AS value
FROM
co2_total_cdiac AS d
RIGHT JOIN
countries_view AS c ON c.id = id_country
RIGHT JOIN
regions AS r ON r.id = c.reg_id
WHERE
year_start = 2001 OR year_start = 2002 OR year_start = 2003
GROUP BY
r.name,
year_start
ORDER BY
1,2;
', 3) AS ct(name varchar, y_2001 numeric, y_2002 numeric, y_2003 numeric)
ORDER BY
name ASC
Is there a way to substitute this with a "static" value, such as "Global"? So, that the query still results in three columns?
Thanks for any advice!
Stef
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Stefan Schwarzer
Lean Back and Relax - Enjoy some Nature Photography:
Appetite for Global Data? UNEP GEO Data Portal:
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