I put on mariadb some output ELK with an output jdbc plusgin. Everything works but source time is UTC and i would like to convert date field into timezone Europe/Paris.
Here's a sample of my INSERT INTO statement :
INSERT INTO EventData ( Hour, Provider, Code, Action, Outcome ) VALUES( in_Hour, in_Provider, in_Code, in_Action, in_Outcome );
Other Question : is it possible to convert existing hour values to the good timezone?
MariaDB has good timezone.
Hour field is DATETIME format.
Thanks.
there is such a function in the sql CONVERT_TZ
https://mariadb.com/kb/en/convert_tz/
Related
Here the requirement is to convert sysdate to in to YYYYMMDD in date format. Here issue it converts this in string but I need this to convert in date format in YYYYMMDD form.
select to_char(trunc(sysdate-1),'YYYYMMDD') cdr_date from dual;
Would be easier to help if you mentioned what database you were using in your post or at least your tags. However based on the to_char function you are using I am assuming oracle. If that is right then the below code should help you out. I found this by simply googling oracle date format and going to the first link which is:
https://www.techonthenet.com/oracle/functions/to_date.php
Select to_date(trunc(sysdate-1),'YYYYMMDD') cdr_Date from dual;
cloud somebody explain to me why casting timestamp to date in psql gives me wrong value? I have in my db stored time stamp value 2016-12-04 00:05:09.748000 and my machine time is in UTC, and datatype in psql is TIMESTAMP WITH TIME ZONE. If I did this,
orders.completed::date
it gives me 2016-12-03. Problem is that if i have some orders around midnight aggregate functions gives me wrong values. Is there some way how to solve it? I would appreciate any help!
Try this :
(orders.completed::timestamp at time zone 'UTC' at time zone 'America/Los_Angeles')::date;
You need to insert your timezone in query
Hm, I can't reproduce it:
b=# set timezone to "GMT+10";
SET
b=# create table edge (t timestamptz);
CREATE TABLE
b=# insert into edge select now();
INSERT 0 1
b=# select t::date, t from edge;
t | t
------------+-------------------------------
2016-12-08 | 2016-12-08 00:18:30.740132-10
(1 row)
I'm working on an app in which users can log in and select a site which may be in a different time zone. Because the app is showing data that is relevant to that site I've decided to set the default timezone for the app to be the site timezone via NSTimeZone.setDefaultTimeZone. This works great except when I select data out of our sqlite db via FMDB (I don't think FMDB has anything to do with it) and use strftime with 'localtime'. While our data is stored by the minute in UTC using epochs, we often need to show summations by day, weekday or month in the local time zone. For example to get averages by weekday:
select strftime('%w',datetime(epoch,'localtime')),avg(value)
from values
where siteId = 'x'
group by 1
order by 2 desc
The 'localtime' that it's using is the system local time and not the default time zone for the app where all NSDate calls respect the default time zone. There does not to be any other timezone options for strftime other than localtime and UTC and the current work arounds are pretty slow requiring multiple SQL roundtrips where this should easily be handled in 1 query as above.
Can anyone tell me how sqlite on iOS determines 'localtime'? Is there a way to force it to use a different i.e. defaultTimeZone?
As you have seen, SQLite doesn't use NSDate or the app's local timezone. The datetime function converts with a Modifier. Say you had a DB that stores as GMT (I think this is the case for your app):
sqlite> create table mytable (id int, time datetime);
sqlite> insert into mytable values (1, CURRENT_TIMESTAMP);
sqlite> select time from mytable;
2016-06-24 19:05:36 <- THIS IS GMT
sqlite> select datetime(time, 'localtime') from mytable;
2016-06-24 15:05:36 <- THIS IS LOCAL TIME
In this example (and yours) 'localtime' is the Modifier. From the sqlite docs:
Modifiers
The time string can be followed by zero or more modifiers that alter
date and/or time. Each modifier is a transformation that is applied to
the time value to its left. Modifiers are applied from left to right;
order is important. The available modifiers are as follows.
NNN days
NNN hours
NNN minutes
NNN.NNNN seconds
NNN months
NNN years
start of month
start of year
start of day
weekday N
unixepoch
localtime
utc
So you cannot directly convert to the local value. However, because you can use these modifers your app can get your local GMT offset from NSDate:
if let myZone = NSTimeZone(abbreviation: "EST")
{
NSTimeZone.setDefaultTimeZone(myZone)
var offset = (myZone.secondsFromGMT)/3600 as Int
var offsetModifer = "\(offset) hours"
}
Then you can execute your sqlite query as so (building the query using offsetModifer which translates to -4 hours in the example here:
sqlite> select datetime(time, '-4 hours') from mytable;
2016-06-24 15:05:36
I am using Esper & I need to filter events by their timestamp. The events come from an external source.
The challenge is that the cutoff instant is at a different timezone than the events` timestamp, e.g. the cutoff instant is at 3:30 CET (e.g. Prague time) while the timestamp field of the event is at UTC.
This poses a problem when the timezone shifts to Daylight Savings Time, because the cutoff instant needs to be modified in the query. E.g. in this case, if the cutoff instant is 3:30 CET, during winter time it would be on 2:30 UTC and during DST it would be on 1:30 UTC. It means that I have to change the query when the time shifts into and out of DST.
This is the current query:
SELECT *
FROM my_table
WHERE timestamp_field.after( timestamp.withtime(2,30,0,0) )
I would like to have a robust solution that will save me the hassle of changing the cutoff timestamp queries every few months. Can I add the timezone to the query statement itself? Is there any other solution?
It may help to add an event property to the event that represents UTC time i.e. normalize the event timestamp to UTC and use the normalized property instead.
The query could also use a variable instead of the hardcoded numbers. Another option would perhaps be changing Esper source to take in a timezone for some func.s
After struggling unsuccessfully with trying ot do it in the WHERE caluse or using a Pattern, I managed to solve the issue using a [Single-Row Function plugin][1].
I pass the plugin function the cutoff hour, timezone & event timezone and compute the cutoff hour in the event's timezone.
My query changed to:
SELECT *
FROM my_table
WHERE timestamp_field.after( timestamp.withtime(
eventTZHour(2, 'UTC', 'Europe/Prague'), 30, 0, 0) )
I added the Java implementation in a class:
public class EsperPlugins {
public int eventTZHour(int hour, String eventTZ, String cutoffTZ) {
// return tz calculations
}
}
and finally registered the plugin in esper.cfg.xml:
<esper-configuration>
<plugin-singlerow-function name="eventTZHour"
function-class="EsperPlugins"
function-method="eventTZHour"/>
</esper-configuration>
[1]: http://www.espertech.com/esper/release-5.2.0/esper-reference/html/extension.html#custom-singlerow-function from esper's docs
I am using the below query with date filtering, but I am getting wrong result.
SELECT * FROM TRANSACTIONSHISTORY
WHERE DATE > "29-01-2015 12:00:00"
AND DATE < "30-01-2015 00:00:00" AND USERID=abc
I am getting result with date column with value of 29-Jan-2016 records, what am I missing here, can any one help me to get out of this value.
The date format in your SQL will not work because SQLite doesn't have a native datetime type, so it's generally stored either as a string, in YYYY-MM-DD HH:MM:SS.SSS format, or as an numeric value representing the number of seconds since 1970-01-01 00:00:00 UTC. See date and time types on SQLite.org. Note that if you're using the string representation that the sequence is year, month, day (which, when sorting/querying this string field, the this alphanumeric string will sort correctly by year first, then month, and then day, which is critical when doing queries like yours).
If you really stored dates in the database as a string in the DD-MM-YYYY HH:MM:SS format, you should consider changing the format in which you saved the values into one of the approved date formats. It will make the date interactions with the database much, much easier, allowing queries like the one you asked for (though, obviously, with DD-MM-YYYY replaced with YYYY-MM-DD format).
You have cast your string to Date
SELECT * FROM TRANSACTIONSHISTORY WHERE DATE between Datetime('29-01-2015 12:00:00') and Datetime('30-01-2015 00:00:00') AND USERID=abc
The first answer is exactly what you need. What you did in your code would be comparing strings using ASCII values.
I would recommend you to use the linux time stamps like: 1453818208, which is easier to save and compare. In addition, it can always be translated to human-readable dates like: 29-01-2015 12:00:00.
SELECT * FROM TRANSACTIONSHISTORY
WHERE DATE > "29-01-2015 12:00:00"
AND DATE < "30-01-2015 00:00:00" AND USERID=abc
I hope this helps you :)
Try this first try without Time,after that try date and time both , Hope i will work for you
SELECT TRANSACTIONSHISTORY
FROM SHIPMENT
WHERE DATE
BETWEEN '11-15-2010'
AND '30-01-2015'
// you can try this one also
SELECT * FROM TRANSACTIONSHISTORY WHERE DATE BETWEEN "2011-01-11" AND "2011-8-11"