Re: Converting to number with given format

I'm not completely sure that that actually works

SELECT to_number('9,134', '9V3') = 9

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

On Wed, 19 Sep 2018 at 14:57, Adrian Klaver <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
>