Re: Find min year and min value

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От Richard Huxton
Тема Re: Find min year and min value
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Msg-id 47024E17.30804@archonet.com
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Ответ на Re: Find min year and min value  (Stefan Schwarzer <stefan.schwarzer@grid.unep.ch>)
Ответы Re: Find min year and min value  (Stefan Schwarzer <stefan.schwarzer@grid.unep.ch>)
Список pgsql-general
Stefan Schwarzer wrote:
>>> Hi there,
>>> I am trying to find in a table with different variables, countries
>>> and years the
>>>     lowest year
>>> and within that year the
>>>     lowest value
>>> The following SELECT works, but I wonder if it is "elegant". Can you
>>> recommend any other solution?
>>
>> SELECT value AS minv FROM public_on_table.data
>> WHERE id_variable = 1
>> ORDER BY year, value LIMIT 1
>
> But that brings only the min value, not the min year. I need to know
> both of them, something like
>
>      (min year = ) 1972, (min value = ) 20

SELECT year, value FROM ...

--
   Richard Huxton
   Archonet Ltd

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