I would like to know how to get a date with 00 hour, 00 minutes and 00 seconds.
This
select to_char(sysdate, 'dd/MM/YYYY HH:mm:ss') from dual;
gives the date at the time I asked it
If I don't give any hour :
select to_char(to_date('03/05/2017', 'DD/MM/YYYY'), 'DD/MM/YYYY HH:mm:ss') from dual;
I have a date at noon.
How can I get a date (with sysdate or giving my own date with to_date) at 00:00:00
Thank you
Use TRUNC( date_value, format_model ) and either omit the format model (the default is to truncate to midnight) or use one of the format models 'ddd', 'dd' or 'j':
SELECT TRUNC( SYSDATE ) FROM DUAL;
I dont give any hour :
select to_char(to_date('03/05/2017', 'DD/MM/YYYY'), 'DD/MM/YYYY HH:MI:SS') from dual;
I have a date at noon.
No, you have the date at midnight formatted with a 12-hour clock.
select to_char( to_date('03/05/2017', 'DD/MM/YYYY'), 'DD/MM/YYYY HH:MI:SS PM')
Outputs 03/05/2017 12:00:00 AM
To get a 24-hour clock you need to use HH24 in the format model (rather than HH or HH12 which is a 12-hour clock):
select to_char( to_date('03/05/2017', 'DD/MM/YYYY'), 'DD/MM/YYYY HH24:MI:SS')
Outputs 03/05/2017 00:00:00
mm should be replaced with mi for minutes:
select to_char(to_date('03/05/2017', 'DD/MM/YYYY'), 'DD/MM/YYYY HH:mm:ss') from dual;
Related
select to_date('25-MAY-20 12.10.12.320000 PM', 'dd-mon-yy hh:mi:ss pm') from dual;
getting the error
"am or pm required"
Oracle only stores precision up to seconds in a date type. If you want fractional seconds (e.g. milliseconds) you will need to use a timestamp column. But in any case, your current format mask is wrong. Try this instead:
SELECT TO_TIMESTAMP('25-Feb-20 12.10.12.320000 PM', 'dd-mon-yy hh.mi.ss.ff6 pm')
FROM dual
Demo
You can convert your timestamp into char and then convert to date.
Example with systimestamp:
select to_date(
to_char(systimestamp,'dd-mon-yy hh:mi:ss PM')
, 'dd-mon-yy hh:mi:ss PM')
from dual;
I have simple calculation, I subtract interval from date with time:
select TO_DATE('2016-12-05 23:04:59', 'YYYY-MM-DD HH24:MI:SS') - to_dsinterval('00 0:05:00') from dual;
It works fine, the result: 2016-12-05 22:59:59
but it doesn't work correctly with timezones, so the next approach solves the problem with timezone. I just wrap expression with to_date() one more time
select TO_DATE(
TO_DATE('2016-12-05 23:04:59', 'YYYY-MM-DD HH24:MI:SS') - to_dsinterval('00 0:05:00')) from dual;
but now it turns time to zeros. Result should be: 2016-12-05 22:59:59 but actual: 2016-12-05 00:00:00
If I add format to the outer to_date as this:
select to_date( TO_DATE('2016-12-05 23:04:59', 'YYYY-MM-DD HH24:MI:SS') - to_dsinterval('00 0:05:00'), 'YYYY-MM-DD HH24:MI:SS') from dual;
The result become very strange: 0005-12-16 00:00:00
What I'm doing wrong?
DATE data type does not support any time zone functions, you must use TIMESTAMP WITH TIME ZONE for that.
Your query
SELECT TO_DATE( TO_DATE('2016-12-05 23:04:59', 'YYYY-MM-DD HH24:MI:SS') - TO_DSINTERVAL('00 0:05:00'), 'YYYY-MM-DD HH24:MI:SS')
FROM dual;
does following:
Create a DATE '2016-12-05 23:04:59'
Subtract interval '00 0:05:00'
Cast to a VARCHAR2 (using NLS_DATE_FORMAT format)
Cast to a DATE using YYYY-MM-DD HH24:MI:SS format
In case your NLS_DATE_FORMAT would be equal to YYYY-MM-DD HH24:MI:SS this query returns correct output.
Use this one:
SELECT TO_TIMESTAMP('2016-12-05 23:04:59', 'YYYY-MM-DD HH24:MI:SS') - TO_DSINTERVAL('00 0:05:00')
FROM dual;
TO_DATE(... works as well. If you need time zone support you must do:
SELECT TO_TIMESTAMP_TZ('2016-12-05 23:04:59 Europe/Berlin', 'YYYY-MM-DD HH24:MI:SS TZR') - TO_DSINTERVAL('00 0:05:00')
FROM dual;
TO_DATE( char, fmt, nls ) takes VARCHAR2 arguments.
Performing TO_DATE('2016-12-05 23:04:59', 'YYYY-MM-DD HH24:MI:SS') - to_dsinterval('00 0:05:00') returns a DATE datatype which when you pass it to TO_DATE() oracle will cast it to a VARCHAR2 datatype so it matches the expected datatype of the argument (implicitly calling TO_CHAR( value, NLS_DATE_FORMAT ) to perform this cast) and then convert this back to a DATE datatype.
You just need to do:
SELECT TO_DATE('2016-12-05 23:04:59', 'YYYY-MM-DD HH24:MI:SS')
- to_dsinterval('00 0:05:00')
FROM DUAL;
If you want to handle time zones then use a TIMESTAMP AT TIME ZONE and just convert it to whatever timezone you want to store the date at:
SELECT TIMESTAMP '2016-12-05 23:04:59 Europe/Paris' AT TIME ZONE 'UTC'
FROM DUAL;
(Will create your timestamp in Paris' time zone and convert it to the correct time in the UTC time zone).
How to convert 26-Mar-15 03.42.43.601000000 pm to yyyy-mm-dd hh24:mi:ss. Can anyone help me on this ?
First convert your string/varchar2 into a timestamp, and then format it back to a string with your format:
SQL> select to_char
2 ( to_timestamp('26-Mar-15 03.42.43.601000000 pm','dd-Mon-rr hh.mi.ss.ff9 am')
3 , 'yyyy-mm-dd hh24:mi:ss'
4 )
5 from dual
6 /
TO_CHAR(TO_TIMESTAM
-------------------
2015-03-26 15:42:43
1 row selected.
Yo can convert the date string to timestamp by;
select to_timestamp('26-Mar-15 03.42.43.601000000 pm', 'dd-mon-yy hh.mi.ss.FF9 AM')
from DUAL
If you want to get the data in yyyy-mm-dd hh24:mi:ss then use to_char function
select
to_char(
to_timestamp('26-Mar-15 03.42.43.601000000 pm', 'dd-mon-yy hh.mi.ss.FF9 AM'),
'yyyy-mm-dd hh24:mi:ss'
)
from DUAL
Given a timestamp value, i.e. "04-SEP-14 03.09.09.272949000 PM", how do I get the date time up to just the seconds part and zeroing out the micro-seconds part?
given: 04-SEP-14 03.09.09.272949000 PM
wish: 04-SEP-14 03.09.09.00 PM
thanks in advance.
You can use the cast function to cast it to a zero-millisecond TIMESTAMP with the construct:
cast(<your column>, timestamp(0))
Using a CTE to pass in your value:
with t as (
select to_timestamp('04-SEP-14 03.09.09.272949000 PM',
'DD-MON-RR HH:MI:SS.FF AM') as tstamp
from dual
)
select to_char(cast(tstamp as timestamp(0)), 'DD-MON-RR HH:MI:SS.FF2 AM')
from t;
TO_CHAR(CAST(TSTAMPASTIMESTAMP(0)),'DD-M
----------------------------------------
04-SEP-14 03:09:09.00 PM
You could also cast it twice, once to DATE to strip the milliseconds, and then back to TIMESTAMP again:
with t as (
select to_timestamp('04-SEP-14 03.09.09.272949000 PM',
'DD-MON-RR HH:MI:SS.FF AM') as tstamp
from dual
)
select to_char(cast(cast(tstamp as date) as timestamp),
'DD-MON-RR HH:MI:SS.FF2 AM')
from t;
TO_CHAR(CAST(CAST(TSTAMPASDATE)ASTIMESTA
----------------------------------------
04-SEP-14 03:09:09.00 PM
... which is doing more work as well as being more typing.
You can't use trunc(date) because that implicitly converts the TIMESTAMP to a DATE, and since a DATE is already at that precision you can't pass SS as the fmt anyway.
I'm trying to convert a time (date + time) from one time zone to another. In the query below, I'm trying to convert a time from EST ("America/New_York") to PST ("America/Los_Angeles"). The query is partially working; the results:
DATABASE_DATE = 2012-02-13 1:00:00 PM
LOCALTIME (what I get): 2012-02-12 10:00:00 AM.
So the time is good but the date is wrong. It should be 2012-02-13 instead of 2012-02-12.
Am I doing something wrong? Here's my query:
select to_date( to_char( ( from_tz( to_timestamp( DATABASE_DATE
, 'YYYY-MM-DD HH:MI:SS')
,'America/New_York')
at time zone 'America/Los_Angeles')
,'YYYY-MM-DD HH:MI:SS')
,'YYYY-MM-DD HH:MI:SS') as localtime
from table
Thanks
to_timestamp() gets a string (VARCHAR2, CHAR ...) if you try to give it a date, then oracle will convert it to a string according to NLS_DATE_FORMAT which might vary in different environments and return unexpected results (as in this case).
What you should do is use to_char first, so your query can look like this:
select to_date(to_char((from_tz(to_timestamp(to_char(DATABASE_DATE, 'YYYY-MM-DD HH:MI:SS PM'), 'YYYY-MM-DD HH:MI:SS PM') ,'America/New_York')
at time zone 'America/Los_Angeles'),'YYYY-MM-DD HH:MI:SS PM'),'YYYY-MM-DD HH:MI:SS PM') as localtime
from table
UPDATE: if I understand you right then you want something like this:
select to_char((from_tz(to_timestamp(to_char(DATABASE_DATE, 'YYYY-MM-DD HH:MI:SS PM'), 'YYYY-MM-DD HH:MI:SS PM') ,'America/New_York')
at time zone 'America/Los_Angeles'),'YYYY-MM-DD HH:MI:SS PM TZD') as localtime
from table
SELECT TO_CHAR(NEW_TIME(systimestamp,'EST','PST'), 'DD-MON-YY HH24:MI:SS') AS converted_timestamp_column FROM DUAL;
Please try this as well .There is a function for this purpose in oracle
https://docs.oracle.com/cd/B28359_01/olap.111/b28126/dml_functions_2036.htm
select NEW_TIME (TO_DATE ('2011/11/11 01:45', 'yyyy/mm/dd HH24:MI'), 'AST', 'MST') from dual;