Re: timestamp check

On 07/14/2015 07:13 AM, Ramesh T wrote:
> i added .MS getting values,But Problem query keep on running but not
> displaying results,when i add like limit 5.it <http://5.it> is return
> values..
>
> what is the problem with query..?

As has been explained several times already, subtracting one timestamp
from another is going to get an interval not a timestamp:

postgres(at)production=# select current_timestamp - '01/01/2015'::timestamp;
?column?
--------------------------
194 days 10:37:33.709606
(1 row)

That cannot be turned into a date:

postgres(at)production=# select to_char(current_timestamp -
'01/01/2015'::timestamp, 'DDD HH:MI:SS.MS');
to_char
------------------
194 10:39:06.994
(1 row)

That is not going to change.

So the question remains:

What are you trying to do, get an interval or get a timestamp?

> changed date and changed_dttimezone are are parameters..
>
>
> select to_char((current_timestamp -
> TO_TIMESTAMP(to_char(chaged_date,'YYYY-MM-DD HH24'|| ' '||'MI'||'
> '||'SS')||' '||(SELECT utc_offset FROM pg_catalog.pg_timezone_names
> WHERE name=changed_dttimezone), 'YYYY-MM-DD HH24'||' '||'MI'||'
> '||'SS')::timestamptz),'DDD HH:MI:SS.MS <http://SS.MS>')
>
>
>
>
>
> On Tue, Jul 14, 2015 at 4:23 PM, Ramesh T <rameshparnanditech(at)gmail(dot)com
> <mailto:rameshparnanditech(at)gmail(dot)com>> wrote:
>
> Yes,But i need to display last digits also
>
> Inline image 1
>
> like 1500 08-09-10.738901
>
> On Mon, Jul 13, 2015 at 8:18 PM, Francisco Olarte
> <folarte(at)peoplecall(dot)com <mailto:folarte(at)peoplecall(dot)com>> wrote:
>
> Hi Ramesh:
>
> On Sun, Jul 12, 2015 at 8:21 AM, Ramesh T
> <rameshparnanditech(at)gmail(dot)com
> <mailto:rameshparnanditech(at)gmail(dot)com>> wrote:
>
> postgres query
> select current_timestamp-
> TO_TIMESTAMP(to_char(DATE1, 'YYYY-MM-DD HH24'|| ' '||'MI'||'
> '||'SS')||' '||(SELECT utc_offset FROM
> pg_catalog.pg_timezone_names
> WHERE name=DATETIMEZOZE1) , ''YYYY-MM-DD HH24'||'
> '||'MI'||' '||'SS')::timestamptz
>
> getting result..
>
> Inline image 1
>
>
> But in oracle using systimestamp,to_timestamptz and SS TZH
> is not supporting to_timestamp in postgres.
>
>
> ​I do not know about Oracle, but in postgres you are
> substracting to timestamps ( current_timestamp -
> to_timestamp(whatever) ). This gives you an interval.​
>
>
>
> result..
>
> Inline image 2
>
> diffrence is days displaying in postgres query..i thnk
> something wrong. is it..?
>
>
> ​Days is displaying in postgres query because it is the default
> format to display intervals ( it's a little more complicated,
> but related ).
>
> $ select '1500 days 8 hours 9 minutes 10 seconds'::interval;
> interval
> --------------------
> 1500 days 08:09:10
> (1 row)
>
> If you want a particular format you should use the appropiate
> formatting functions, like to_char
>
> $ select to_char('1500 days 8 hours 9 minutes 10
> seconds'::interval,'DDD HH-MI-SS');
> to_char
> ---------------
> 1500 08-09-10
> (1 row)
>
> Or, you could try to change the default formatting, but this is
> generally incorrect.
>
> Regards.
> Francisco Olarte.
>
>
>
>

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