stddev returns 0 when there is one row

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От Bruno Wolff III
Тема stddev returns 0 when there is one row
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Msg-id 20030419161121.GA31798@wolff.to
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Ответы Re: stddev returns 0 when there is one row
Список pgsql-general
stddev returns 0 when the number of rows is one. I would have expected null
to be returned in this case as the standard deviation is undefined when
there is one row.


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