Re: Converting to number with given format - Mailing list pgsql-general
| From | Gabriel Furstenheim Milerud |
|---|---|
| Subject | Re: Converting to number with given format |
| Date | |
| Msg-id | CAJN3DWqxXTkduu2itfq9yoKP9zAC5N-PXMJ4OuJJrPciCk5Wtg@mail.gmail.com Whole thread Raw |
| In response to | Re: Converting to number with given format (Adrian Klaver <adrian.klaver@aklaver.com>) |
| Responses |
Re: Converting to number with given format
(Adrian Klaver <adrian.klaver@aklaver.com>)
Re: Converting to number with given format (Tim Cross <theophilusx@gmail.com>) Re: Converting to number with given format (Ken Tanzer <ken.tanzer@gmail.com>) |
| List | pgsql-general |
Sorry,
So basically what I'm trying to achieve is the following. There is an input file from the user and a configuration describing what is being inserted. For example, he might have Last activity which is 'YYYY-MM-DD HH:mi:ss' and Join date which is only 'YYYY-MM-DD' because there is no associated timing. For dates this works perfectly and it is possible to configure what the input from the user will be. Think it is as a dropdown where the user says, this is the kind of data that I have.
Maybe that is not possible with numbers? To say in a format something like "my numbers have comma as decimal separator and no thousands separators" or "my numbers are point separated and have comma as thousands separator"
Nice thing of having a string for the format is that I can use it as a parameter for a prepared statement.
Thanks
On Wed, 19 Sep 2018 at 15:22, Adrian Klaver <adrian.klaver@aklaver.com> wrote:
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.klaver@aklaver.com
> <mailto:adrian.klaver@aklaver.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.klaver@aklaver.com <mailto:adrian.klaver@aklaver.com>
>
--
Adrian Klaver
adrian.klaver@aklaver.com
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