RE: count & distinct

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От Andrew Snow
Тема RE: count & distinct
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Msg-id NHEALMDKDACEIPBNOOOCAEKACFAA.als@fl.net.au
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Ответ на count & distinct  ("Andrea Aime" <aaime@comune.modena.it>)
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> Hi people. I would like to make a query that
> tells me how many distinct values there are
> in a column. Standard count doesn't seems
> to support a count distinct option.
> select distint count(*) of course doens't
> work (distinti clause is applied after the
> result are calculated). I've tried to define
> a view, but it didn't worked (
> create view distValues as select distinct ...
> but views doesn't support distinct clause)...


SELECT COUNT(DISTINCT field_name) FROM table_name;

Works for me in v7.


Regards,
Andrew Snow
als@fl.net.au



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