Re: a math question

Поиск
Список
Период
Сортировка
От Chris
Тема Re: a math question
Дата
Msg-id 4630204D.60803@gmail.com
обсуждение исходный текст
Ответ на a math question  (tom <tom@tacocat.net>)
Ответы Re: a math question
Список pgsql-general
tom wrote:

> In pgsql I have to modify this a bit with 'cast (s_msgs as double
> precision)' or 'cast(s_msgs as real)' in order to get floating point math.
> ( cast(s_msgs as double precision)/S_msgs)  and so on...
>
> Question:  Is there a better way to get floating point math out of a set
> of integers?

Nope.

This is mentioned in the docs:
http://www.postgresql.org/docs/8.2/static/functions-math.html

division (integer division truncates results)

I'm sure it's because of sql specs but someone else will throw their
2c's in if that's wrong ;)

You only need one real or double precision field in there for that not
to be truncated, you don't need to cast everything.

--
Postgresql & php tutorials
http://www.designmagick.com/

В списке pgsql-general по дате отправления:

Предыдущее
От: Bill Moran
Дата:
Сообщение: Re: Feature request - have postgresql log warning when new sub-release comes out.
Следующее
От: "A. Kretschmer"
Дата:
Сообщение: Re: Business days