| From: | Oleg Bartunov <oleg(at)sai(dot)msu(dot)su> |
|---|---|
| To: | Mihail Nasedkin <m(dot)nasedkin(dot)perm(at)mail(dot)ru> |
| Cc: | pgsql-ru-general(at)postgresql(dot)org |
| Subject: | Re: null+число |
| Date: | 2005-01-26 08:28:10 |
| Message-ID: | Pine.GSO.4.62.0501261127200.6363@ra.sai.msu.su |
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| Lists: | pgsql-ru-general |
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On Wed, 26 Jan 2005, Mihail Nasedkin wrote:
> Здравствуйте, сообщество pgsql-ru-general.
>
> У меня наверное простой вопрос.
>
> Никак не могу понять как можно суммировать null с числом, чтобы null
> воспринимался как 0.
>
> Т.е. может есть фунцция типа isnull(column_name, 0)?
coalesce спасет тебя
http://www.pgsql.ru/db/pgsearch/index.html?q=coalesce
>
>
Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg(at)sai(dot)msu(dot)su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83
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