You may also wish to review Andreas' suggestions as they propose a
more sensible table structure rather than having a table for each
convention.
The table proposal really looks nice. But our database is structured
by variable - so each convention has its own table.
It is a really bad design -
In response to A. Kretschmer :
> In response to Thom Brown :
> > On 23 February 2010 13:43, Stefan Schwarzer
> > wrote:
> > Select countries.name, basel.year, basel.value, cites.year, cites.value
> > From countries
> > Left Join basel on basel.id_country = countries.id_country and
>
In response to Thom Brown :
> On 23 February 2010 13:43, Stefan Schwarzer
> wrote:
> Select countries.name, basel.year, basel.value, cites.year, cites.value
> From countries
> Left Join basel on basel.id_country = countries.id_country and
> basel.value=1
> Left Join cites
Select countries.name, basel.year, basel.value, cites.year,
cites.value
From countries
Left Join basel on basel.id_country = countries.id_country and
basel.value=1
Left Join cites on cites.id_country = countries.id_country and
cites.value=1
I would have thought so, but the query turns forever.
In response to Stefan Schwarzer :
> >You may also wish to review Andreas' suggestions as they propose a
> >more sensible table structure rather than having a table for each
> >convention.
>
> The table proposal really looks nice. But our database is structured
> by variable - so each convention
On 23 February 2010 13:43, Stefan Schwarzer
wrote:
Select countries.name, basel.year, basel.value, cites.year, cites.value
From countries
Left Join basel on basel.id_country = countries.id_country and
basel.value=1
Left Join cites on cites.id_country = countries.id_country
Select countries.name, basel.year, basel.value, cites.year,
cites.value
From countries
Left Join basel on basel.id_country = countries.id_country and
basel.value=1
Left Join cites on cites.id_country = countries.id_country and
cites.value=1
I would have thought so, but the query turns forever.
On 23 February 2010 13:23, Stefan Schwarzer
wrote:
>> Select countries.name, basel.year, basel.value, cites.year, cites.value
>> From countries
>> Left Join basel on basel.id_country = countries.id_country and
>> basel.value=1
>> Left Join cites on cites.id_country = countries.id_country and
>> ci
Select countries.name, basel.year, basel.value, cites.year,
cites.value
From countries
Left Join basel on basel.id_country = countries.id_country and
basel.value=1
Left Join cites on cites.id_country = countries.id_country and
cites.value=1
I would have thought so, but the query turns fore
In response to Stefan Schwarzer :
> Hi there,
>
> gush, shouldn't be that complicated. But neither in Postgres, nor in Access I
> succeed in getting the result I wish.
>
> I have a couple of times for the Environmental Conventions (Kyoto, Montreal,
> CITES etc.). They look like this:
>
> id_coun
On 23 February 2010 11:44, Stefan Schwarzer
wrote:
> Hi there,
> gush, shouldn't be that complicated. But neither in Postgres, nor in Access
> I succeed in getting the result I wish.
> I have a couple of times for the Environmental Conventions (Kyoto, Montreal,
> CITES etc.). They look like this:
Hi there,
gush, shouldn't be that complicated. But neither in Postgres, nor in
Access I succeed in getting the result I wish.
I have a couple of times for the Environmental Conventions (Kyoto,
Montreal, CITES etc.). They look like this:
id_country,year,value
4,1992,0
4,1993,0
4,1994,0
4,1
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