On Tue, Oct 02, 2007 at 04:29:02PM +0200, Stefan Schwarzer wrote:
> If I want to find the "common smallest year" for two given variables
> (say, I have years 1970, 1971,.... 2005 for variable 1 (GDP) and
> 1980, 1981,... 2003) for variable 2 (Fish Catch) ). It should come up
> with 1980 for a given country, if there is a value for that year in
> both variables. Otherwise 1981, etc...
> How would I do that? I really have no clue...
> (my table looks something like this:
> id_variable | year | value | id_country
> ---------------------------------------
> 1 | 2001 | 123 | 1
select min(year) from (select year from table where id_variable in (1,2)
group by year having count(distinct id_variable) = 2) x;
depesz
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