I am trying to convert from UTC time zone to GMT time zone.
I ran this below query and getting ORA error.
select NEW_TIME(SYSDATE, 'UTC', 'GMT') from dual;
And error is
Error starting at line : 1 in command -
select NEW_TIME(SYSDATE, 'UTC', 'GMT') from dual
Error report -
ORA-01857: not a valid time zone
I googled and find that NEW_TIME function is not accepting UTC time zone.
So, Can you please suggest me alternate solution/any way to convert from UTC to GMT?
UTC is also known as GMT, the latter which NEW_TIME already accepts. So, what you are trying to is equivalent to:
SELECT NEW_TIME(SYSDATE, 'GMT', 'GMT')
FROM dual;
The call to NEW_TIME doesn't make any sense of course. Check here for a list of accepted timezone codes.
Use FROM_TZ from convert a timestamp without a time zone to a timestamp with time zone (i.e. UTC) and then use AT TIME ZONE 'GMT' to convert it from the first time zone to the GMT time zone. You'll need to use CAST in various places as FROM_TZ expects a TIMESTAMP rather than a DATE and then you need to cast back to a DATE at the end (assuming you don't want a TIMESTAMP value):
SELECT CAST(
FROM_TZ(
CAST( SYSDATE AS TIMESTAMP ),
'UTC'
)
AT TIME ZONE 'GMT'
AS DATE
) As gmt_time
FROM DUAL
Output:
| GMT_TIME |
| :------------------ |
| 2019-04-10T14:05:37 |
db<>fiddle here
Related
Is there a native Presto function that provides support to extract the timestamp from a timestamp with time zone?
Taking something like this
SELECT
PARSE_DATETIME('2022-03-13+02:00:99 UTC', 'yyyy-MM-dd+HH:mm:99 ZZZ') AT TIME ZONE 'UTC' AS utc_time
Which returns a value of:
2022-03-13+02:00:99 UTC
To:
2022-03-13+02:00:99
I couldn't find information in the docs for this kind of support. It seems as though my only option is to convert this as a varchar, remove the ' UTC' characters, and then re-convert this into a timestamp if I want to remove the time zone suffix from the timestamp with time zone
You can just cast to timestamp:
SELECT cast(PARSE_DATETIME('2022-03-13+02:00:99 UTC', 'yyyy-MM-dd+HH:mm:99 ZZZ') as timestamp) utc_time
Output:
utc_time
2022-03-13 02:00:00.000
I have a DB (Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production). In there is a table (Course) in which I have a Date column (start_dte). I want to format the output to a char so I used:
SELECT start_dte,
to_Char(start_dte) AS start_dte_2,
to_Char(start_dte,'DD.MM.YYYY') AS start_dte_3,
to_Char(start_dte,'DD.MM.YYYY HH24:MI:SS') AS start_dte_4,
to_Char(start_dte,'DD.MM.YYYY HH12:MI:SS') AS start_dte_5,
to_Char(start_dte,'DD.MM.YYYY HH.MI.SSXFF AM') AS start_dte_6,
to_Char(start_dte,'DD.MM.YYYY HH24:MI:SSxFF') AS start_dte_7,
to_Char(start_dte,'DD-MON-YYYY HH24:MI:SSxFF TZH:TZM') AS start_dte_8
FROM Course
The Results:
Number 6,7,8 give me
java.sql.SQLException: ORA-01821: date format not recognized
6 has the same format as:
SELECT value
FROM V$NLS_PARAMETERS
WHERE parameter = 'NLS_TIME_FORMAT'
7 and 8 are taken from the Oracle documentation but this is only for timestamps. So what i am missing? I know the actual datatype should be datetime but I only have read access to that DB. What i would actually like:
Or even better:
A DATE doesn't have any time zone information, so if you want to adjust the displayed time then you'll need to specify which time zone that date nominally represents, and which time zone you want to convert it to.
An an example, if your stored date represents UTC and you want to see the equivalent local time in Paris, you can state that the stored time is UTC by casting it as a plain timestamp and passing that into the from_tz() function; and then specify the target timezone with at:
-- CTE for your sample data
with course (start_dte) as (
select cast(timestamp '2018-10-17 14:00:00' as date) from dual
)
-- actual query
select from_tz(cast(start_dte as timestamp), 'UTC')
at time zone 'Europe/Paris' as start_timestamp_tz
from course;
START_TIMESTAMP_TZ
------------------------------------------
2018-10-17 16:00:00.000000000 EUROPE/PARIS
Since you're querying this via JDBC you probably want to retrieve that as its native data type, and then choose how to display it locally. (But you could presumably query it as a date and adjust it in Java too...)
If you want to convert it to a string on the DB side, though, just use the format model you already used:
select to_char(from_tz(cast(start_dte as timestamp), 'UTC')
at time zone 'Europe/Paris', 'DD.MM.YYYY HH24:MI') as start_date
from course;
START_DATE
----------------
17.10.2018 16:00
Getting it into two fields is also simple, and if you don't want to repeat the conversion you can use a CTE or an inline view:
select to_char(start_timestamp_tz, 'DD.MM.YYYY') as start_date,
to_char(start_timestamp_tz, 'HH24:MI') as start_time
from (
select from_tz(cast(start_dte as timestamp), 'UTC')
at time zone 'Europe/Paris' as start_timestamp_tz
from course
);
START_DATE START_TIME
---------- ----------
17.10.2018 16:00
But it sounds like Java should be doing that conversion to strings for display.
What i would actually like:
| START_DATE |
|------------------|
| 17.10.2018 16:00 |
Or even better:
| START_DATE | START_TIME |
|------------|------------|
| 17.10.2018 | 16:00 |
Use:
SELECT to_Char(start_dte,'DD.MM.YYYY') AS start_date,
to_Char(start_dte,'HH24:MI') AS start_time
FROM Course
If your data is stored in the table in one time zone (i.e. UTC) and you want it in another time zone then use:
CAST( date_value AS TIMESTAMP ) to convert it from a DATE data type to a TIMESTAMP data type.
FROM_TZ( timestamp_value, timezone_string ) to convert it from a TIMESTAMP data type to a TIMESTAMP WITH TIME ZONE data type at the given time zone.
timestamp_with_timezone_value AT TIME ZONE timezone_string to convert it from one time zone to another time zone.
Like this:
SELECT TO_CHAR(
FROM_TZ( CAST( start_dte AS TIMESTAMP ), 'UTC' ) AT TIME ZONE 'Europe/Berlin',
'DD.MM.YYYY'
) AS start_date,
TO_CHAR(
FROM_TZ( CAST( start_dte AS TIMESTAMP ), 'UTC' ) AT TIME ZONE 'Europe/Berlin',
'HH24:MI'
) AS start_time
FROM Course
start_dte is a DATE value.
DATE does neither have fractional seconds (i.e. XFF) nor time zone information (i.e. TZH:TZM)
Use TIMESTAMP WITH TIME ZONE is you like to get such output.
I have a numeric field in my Oracle database that represents the date.
I'm not so familiar with Oracle commands.
I was wondering if anyone could provide some guide here.
Thanks.
example: 1435755908 = 7/1/2015 9:05
This is a Unix Timestamp, i.e. the seconds since January 1970, try this formula:
timestamp '1970-01-01 00:00:00' + 1435755908/86400
Since there seems to be a time zone difference:
select date '1970-01-01' + 1435755908/86400 as converted from dual;
CONVERTED
----------------------------------------
2015-07-01 13:05:08
you seem to need to do some time zone manipulation. Epoch times are UTC so you can use from_tz to declare that, and then at time zone to get the US/East Coast equivalent:
select from_tz(cast(date '1970-01-01' + 1435755908/86400 as timestamp), 'UTC')
at time zone 'America/New_York' as converted from dual;
CONVERTED
----------------------------------------
2015-07-01 09:05:08.000 AMERICA/NEW_YORK
Which is a time stamp with time zone. If you want it as a plain date then cast it:
select cast(from_tz(cast(date '1970-01-01' + 1435755908/86400 as timestamp), 'UTC')
at time zone 'America/New_York' as date) as converted from dual;
CONVERTED
----------------------------------------
2015-07-01 09:05:08
I have a date and time variable in TABLE_A that is in GMT. I want to insert this date and time into TABLE_B, but I want the insterted value to be adjusted for time zone and summer/winter time.
That is:
INSERT into TABLE_A (ADJUSTED_DATE_AND_TIME)
SELECT GMT_DATE_AND_TIME [Perform proper adjustments here..?]
FROM TABLE_A
Can I do this? In that case, how do I write ?
Thank.
I think you can simply convert the GMT/UTC time. However, you have to take the full region name of your time zone.
SELECT TIMESTAMP '2014-06-10 12:00:00 +00:00' AT TIME ZONE 'Europe/Zurich' AS summer FROM dual;
SUMMER
---------------------------------------
10.06.2014 14:00:00.000000000 +02:00
SELECT TIMESTAMP '2014-12-10 12:00:00 +00:00' AT TIME ZONE 'Europe/Zurich' AS winter FROM dual;
WINTER
---------------------------------------
10.12.2014 13:00:00.000000000 +01:00
Since your source value is data type DATE you have to do following steps.
Cast DATE to TIMESTAMP
Set Time zone of the value using FROM_TZ
Convert the value to new time zone using AT TIME ZONE '...'
Cast the value to DATE
Written in a single statement it is
select
CAST(FROM_TZ(CAST(sy_sttime AS TIMESTAMP), 'UTC') AT TIME ZONE 'Europe/Zurich' AS DATE)
from sy_request
or a bit less clear
select
CAST((CAST(sy_sttime AS TIMESTAMP) AT TIME ZONE 'UTC') AT TIME ZONE 'Europe/Zurich' AS DATE)
from sy_request
I'm trying to read an Oracle TIMESTAMP WITH TIMEZONE from a database in UTC-5 (NY) as UTC.
Oracle is driving me crazy:
SELECT
from_tz(MAX(TIMESTAMPWITHTIMEZONE),'UTC'),
SYS_EXTRACT_UTC(MAX(TIMESTAMPWITHTIMEZONE)),
SYS_EXTRACT_UTC(systimestamp),
SYSTIMESTAMP AT TIME ZONE 'UTC'
FROM TABLE
Results:
SYS_EXTRACT_UTC(systimestamp) gives me: 2013-02-20 14:59:04, which is probably right.
SYSTIMESTAMP AT TIME ZONE 'UTC' gives me: 2013-02-20 15:59:04 which is my own local Berlin - whatever
Now I want to have TIMESTAMPWITHTIMEZONE (TIMESTAMP(6)) as UTC
SYS_EXTRACT_UTC(MAX(TIMESTAMPWITHTIMEZONE)) is 2013-02-20 08:55:01
from_tz(MAX(TIMESTAMPWITHTIMEZONE),'UTC') is 2013-02-20 10:55:01
Srly. Oracle. I want UTC.
Which one is the right one? Or is there a better way?
The functions are different:
SYS_EXTRACT_UTC converts a TIMESTAMP WITH TIMEZONE to a TIMESTAMP (with inferred but absent timezone=UTC).
FROM_TZ converts a TIMESTAMP to a TIMESTAMP WITH TIMEZONE
These functions when applied to a single value will in general return a different result:
SQL> SELECT sys_extract_utc(localtimestamp) ext,
2 from_tz(localtimestamp, 'UTC') from_tz
3 FROM dual;
EXT FROM_TZ
--------------------- ------------------------
2013/02/20 15:34:24 2013/02/20 16:34:24 UTC
In the first case the TIMESTAMP is implicitly given the timezone of the server and then transformed into the equivalent timestamp at the UTC timezone. Note that in general you should stay away from implicit conversions.
In the second case there is no computation between timezones: the FROM_TZ function adds the geographical location to a point in time variable.
By the way there is something missing in your example: you can't apply the FROM_TZ function on a variable of type TIMESTAMP WITH TIMEZONE (tested on 9ir2 and 11ir2):
SQL> select from_tz(systimestamp, 'UTC') from dual;
select from_tz(systimestamp, 'UTC') from dual
ORA-00932: inconsistent datatypes:
expected TIMESTAMP got TIMESTAMP WITH TIME ZONE
Edit following comment:
In your case assuming that your column are of time TIMESTAMP, and knowing that they refer to the NY timezone, you could use the AT TIME ZONE expression to convert to UTC:
SQL> SELECT localtimestamp,
2 from_tz(localtimestamp, 'America/New_York') AT TIME ZONE 'UTC' utc
3 FROM dual;
LOCALTIMESTAMP UTC
--------------------- ------------------------
2013/02/20 17:09:09 2013/02/20 22:09:09 UTC
From Oracle 18c you could use TO_UTC_TIMESTAMP_TZ function:
The TO_UTC_TIMESTAMP_TZ function converts any valid ISO 8601 date represented as a string into a TIMESTAMP WITH TIMEZONE, which can optionally be used as input to the SYS_EXTRACT_UTC function.
SELECT TO_UTC_TIMESTAMP_TZ(col_name)
FROM tab_name;