Обсуждение: how to convert float to timestamp in single select query

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how to convert float to timestamp in single select query

От
Maulik Shah
Дата:
Dear Sir/Madam


how to convert float to timestamp in single select query

for exp. i have float as 1.251152515236 ,

i want to convert this to datetime and from datetime to timestamp...
i.e. 02:22:044456

I need sql query


It is actually .crd file made in xml , and i have query inside xml like


<![CDATA[
SELECT USER.LastName, USER.fltime from Tbalname


]>



fltime has float value which i need to convert to time


Regards
Maulik Shah


Re: how to convert float to timestamp in single select query

От
"David G. Johnston"
Дата:
On Sun, Mar 29, 2015 at 8:52 PM, Maulik Shah <mauliks@rosconsultancy.in> wrote:
Dear Sir/Madam


how to convert float to timestamp in single select query

for exp. i have float as 1.251152515236 ,

i want to convert this to datetime and from datetime to timestamp...
i.e. 02:22:044456

​You imply that (float) 1.251152515236 is equal to (time) 02:22:044456​

I have no clue what formula:  f(x) = ?x? would satisfy f(1.251152515236) = '02:22:044456'::time

Once you answer that you can either inline said formula or create a user-defined function to encapsulate it.  See the documentation for the how.

David J.

Re: how to convert float to timestamp in single select query

От
Adrian Klaver
Дата:
On 03/29/2015 08:52 PM, Maulik Shah wrote:
> Dear Sir/Madam
>
>
> how to convert float to timestamp in single select query
>
> for exp. i have float as 1.251152515236 ,

test=> select to_timestamp(1.251152515236);
          to_timestamp
-------------------------------
  1969-12-31 16:00:01.251153-08


The above assumes your value is seconds since epoch, which I am pretty
sure is not the case here.

>
> i want to convert this to datetime and from datetime to timestamp...
> i.e. 02:22:044456

Well the above is a time not a datetime or timestamp, so I am not really
sure what you are after? In other words more context is needed about
where the value is coming from and what other information is available
to anchor it to a datetime.

>
> I need sql query
>
>
> It is actually .crd file made in xml , and i have query inside xml like
>
>
> <![CDATA[
> SELECT USER.LastName, USER.fltime from Tbalname
>
>
> ]>
>
>
>
> fltime has float value which i need to convert to time
>
>
> Regards
> Maulik Shah
>
>


--
Adrian Klaver
adrian.klaver@aklaver.com