I am trying to save datetime with timezone in Postgres but can not find anything usefull.
Input would be like,
2021-03-21T12:24:30Z
2021-03-21T12:24:30PST'
and i am expecting output in the datetime column like,
'2001-02-16 18:38:40+05:30'
'2001-02-16 18:38:40+00'
what would be the datatype in column and what's the way i can save the date time including timezone.
You should use the TIMESTAMPTZ data type for the column - https://www.postgresql.org/docs/9.5/datatype-datetime.html
Related
We are storing date time in "2022-11-30T17:30:00.000Z" format in var char column i know its totally wrong but I want to rectify the mistake and use the column as timestamp with time zone.
I Tried using column::timestamp AT TIME ZONE 'Asia/Calcutta' but still date and time is wrong as it does not considers +5:30 in my time zone.please suggest how can i transform the column or if i could use the same column.
select dtm from dashboard where (select dtm::timestamp AT TIME ZONE 'Asia/Calcutta')::date between '2022-11-30' and '2022-11-30' order by dtm;
I have excel column with 2022-12-26 23:59:59 like timestamp and I want to add this data according to my local timezone to Postgres as a timestamp without timezone as a long(BIGINT) 1672117199. With which query I can achieve this?
I have been struggling since few days to identify correct format for sample input date:
2020-01-30 14:39:25.022000 +00:00:00
Background :
I am working on data migration with postgres. And, have identified that in DB, the datetime related fields like 'modifiedAt' have datatype as varchar, which is bit weird. These records have values in above mentioned format.
I have fixed it in new postgres DB instance with datatype as timestamp. After migrating data, these fields are showing datetime in following format:
2020-01-30 14:39:25
How can I format above date to give output in this dateformat 2020-01-30 14:39:25.022000 +00:00:00?
Any help will be appreciated.
First you want to use timestamptz not timestamp. timestamptz does not actually store the time zone, it just makes the value time zone aware. For more information on this see:
Time Stamps 8.5.1.3. Time Stamps.
Second it looks like you did something like timestamp(0) which reduced the precision to whole seconds. If you leave the precision alone you get:
select '2020-01-30 14:39:25.022000 +00:00:00'::timestamptz;
timestamptz
-----------------------------
01/30/2020 06:39:25.022 PST
-- I am in PST so the value gets rotated to that time zone for display.
-- If you want something closer to you desired output, then:
select to_char('2020-01-30 14:39:25.022000 +00:00:00'::timestamptz AT TIME ZONE 'UTC', 'YYYY-MM-DD HH24:MI:SS.USOF');
to_char
-------------------------------
2020-01-30 14:39:25.022000+00
While your timestamp strings do appear to have a time zone component, it is +00, which is the default for timestamps. So, you might be able to just use TO_TIMESTAMP here with an appropriate format mask covering microseconds:
WITH yourTable AS (
SELECT '2020-01-30 14:39:25.022123 +00:00:00'::text AS ts
)
SELECT TO_TIMESTAMP(LEFT(ts, 26), 'YYYY-MM-DD HH24:MI:SS.US')
FROM yourTable;
Demo
The output value from the demo above is 2020-01-30 14:39:25.022123+00
I have a PostgreSQL table with date field in the following format
2017-09-07T17:24:33+08:00
and I want to convert it to UTC time.
I've looked around but found no way to do that with this specific time format. What am I missing?
Thanks
timezone definition (https://www.postgresql.org/docs/9.1/functions-datetime.html) : The function timezone(zone, timestamp) is equivalent to the SQL-conforming construct timestamp AT TIME ZONE zone
SELECT timezone('UTC','2017-09-07T17:24:33+08:00');
if selecting from column,
with t as (
SELECT '2017-09-07T17:24:33+08:00' as tm
)
SELECT timezone('UTC',tm::timestamptz) as ts
from t;
I have a PostgreSQL table with date field in the following format: 2017-09-07T17:24:33+08:00
This is incorrect. Per Postgres documentation,
All timezone-aware dates and times are stored internally in UTC. They are converted to local time in the zone specified by the TimeZone configuration parameter before being displayed to the client.
To display a TIMESTAMP WITH TIME ZONE attribute (which, again, is stored internally in UTC) in a specific time zone, you have a few options:
By default, “They are converted to local time in the zone specified by the TimeZone configuration parameter before being displayed to the client.” This can be set in postgresql.conf, using the SQL command SET TIME ZONE, or using a number of other options.
Use the AT TIME ZONE construct.
So, in regards to your original question: You don't have to do anything to your timestamptz for Postgres to store it in UTC. To display your attribute in UTC, you can either change the TimeZone configuration paramter, or use the construct below:
SELECT dt_with_timezone AT TIME ZONE 'UTC' FROM my_table
This seems like it would be a common problem so perhaps I am missing something obvious. Using Joda Time I want to persist dates with a timezone. If I wasn't using JPA I would want to do something like this to save and retrieve the timestamps:
create table test_dates
(
zone varchar(50),
ts_with_time_zone timestamp with time zone
);
insert into test_dates values ('UTC', '2012-08-12 12:34:56 UTC');
insert into test_dates values ('MST', '2012-08-12 05:34:56 MST');
select 'UTC in MST', ts_with_time_zone at time zone 'MST'
from test_dates where zone = 'UTC';
How then can I save and retrieve these timestamps with the specified timezone using Joda Time, JPA, EclipseLink and Postgres?
I have seen answers using converters but I am not sure how you would specify or use time zones. Sure I could get the UTC time and convert it myself but that defeats the purpose of having the "with time zone" column. Is this possible?
The ideal solution would be if EclipseLink handled JodaTime similar to hibernate.
You may be able to customize your PostgreSQLPlatform to add support for storing the time-zone through JDBC. Your JDBC driver will have to support the time-zone (most likely through a custom type, or a Calendar API).
EclipseLink does have support for time-zones on Oracle, so it should be possible to extend the PostgreSQLPlatform for time-zones as well if the database and JDBC drivers support it.
You don't save the time zone. You just save the timestamp with the time zone specified in the input string. The time zone will not be saved.
select '2012-08-12 12:34:56 UTC'::timestamp with time zone;
timestamptz
------------------------
2012-08-12 09:34:56-03
select '2012-08-12 05:34:56 MST'::timestamp with time zone;
timestamptz
------------------------
2012-08-12 09:34:56-03
The timezone will be the database timezone.
select now()::timestamp with time zone;
now
-------------------------------
2012-12-10 12:26:16.318484-02