Re: Converting to number with given format

On 9/19/18 6:11 AM, Gabriel Furstenheim Milerud wrote:
> I'm not completely sure that that actually works
>
> SELECT to_number('9,134','9V3') =9

SELECT (to_number('9,134', '99999')/1000)::numeric(4,3);
numeric
---------
9.134

>
> It's true when it should be false (it should be 9.134). Also it is
> completely dependent on the number of digits. So for example:
>
> SELECT to_number('19,134','9V3')
>
> Is 1, not 19.134 or even 19

We probably ought to back this question up and ask what is you want to
achieve in general?

>
> On Wed, 19 Sep 2018 at 14:57, Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com>> wrote:
>
> On 9/19/18 5:38 AM, Gabriel Furstenheim Milerud wrote:
> > Hello,
> > I'd like to convert a string number to a number being able to
> provide
> > the custom format.
> > With dates it works perfectly fine, so that I can do:
> >
> > SELECT to_date('18 09 10', 'YY MM DD')
> >
> > Is there something similar with numbers?
> >
> > SELECT to_number('9,000',some_format) =9;
>
>   SELECT to_number('9,000', '9V3')::int;
>   to_number
> -----------
>           9
>
> > SELECT to_number('9,000',another_format) =9000;
>
> SELECT to_number('9,000', '99999');
>   to_number
> -----------
>        9000
>
> >
> > It is not clear to me what some_format should be and what
> another_format
> > should be so that those selects are equal.
> >
> > I've read the documentation but I can't find a similar example. In
> > stackoverflow they don't provide a solution either:
> >
> https://stackoverflow.com/questions/18882942/postgresql-convert-a-string-with-commas-into-an-integer
> >
> > Thanks
> > Gabriel Fürstenheim
>
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com