Обсуждение: Interval fields

Hello,

If I have an interval of say '1 day 3 hours 30 minutes' how might I
express that form of a specified interval type, ie for hours : '27.3 hours'.

Is the only option to write a function that takes an interval and
returns text in that format?

Thank you,
- A Gilmore

A Gilmore <agilmore@shaw.ca> schrieb:

> Hello,
>
> If I have an interval of say '1 day 3 hours 30 minutes' how might I express
> that form of a specified interval type, ie for hours : '27.3 hours'.
>
> Is the only option to write a function that takes an interval and returns
> text in that format?

A 'intervall' can also be something like this:

,----[  how many hours has a month?  ]
| test=> select age(t2,t1) from foo2;
|            age
| -------------------------
|  8 mons 29 days 19:00:00
`----


I think, it is better to ask:

,----
| test=> select extract(epoch from t2) - extract(epoch from t1) from foo2;
|  ?column?
| ----------
|  23565600
`----

Now you can also ask:

,----
| test=> select (extract(epoch from t2) - extract(epoch from t1)) / 3600::float as hours from foo2;
|  hours
| -------
|   6546
`----





Regards, Andreas
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