In Mosaic Decisions Flows, I can see there's a system parameter called "$currentTime" which gives the current timestamp. But this is giving the current timestamp in UTC. I want to convert it into CST timezone. Is there a way I can do that?
Yes, you can use Convert_Timezone function available in transformation node. Below is the syntax for it.
CONVERT_TIMEZONE( column_name, ‘Timezone1’ , ‘Timezone2’);
Column_name – input time based column.
Timezone1 – the timezone the column data is in.
Timezone2 – the timezone in which the column data has to be converted in.
CONVERT_TIMEZONE (NOW(), ‘UTC’ , ‘CST6CDT’ ) -> NOW() will give you the currentTime
Similarly you can use – SystemV/CST6CDT, SystemV/CST6, based on the requirement.
Also you can refer Transformation section in user guide for further details on it [link below] :
https://mosaic.ga.lti-mosaic.com/usermanual/Transformer.html
Related
I want to create a column of data type having only 'mm-dd' values.
Is it possible and if yes how should I do it?
Note: Instead of "2022-06-07", I want "07-06"
There is no date type that can store that format - in fact none of the date types store a date and/or time in any of the formats you typically recognize.
For your specific requirement, that looks like a char(5) for the data type, but how you constrain it so that it will only accept valid date values, I have no idea. You'd think this would work:
CHECK (TRY_CONVERT(date, string_column + '-2022', 105) IS NOT NULL)
But what about leap years? February 29th is sometimes valid, but you've thrown away the only information that can make you sure. What a bunch of mess to store your favorite string and trust that people aren't putting garbage in there.
Honestly I would store the date as a date, then you can just have a computed column (or a column in a view, or just do this at query time:
d_slash_m_column AS CONVERT(char(5), date_column, 105)
Why not just in your query (or only in a view) say:
[output] = CONVERT(char(5), data_in_the_right_type, 105)
?
I'd personally stay away from FORMAT(), for reasons I've described here:
FORMAT() is nice and all, but…
FORMAT is a convenient but expensive function - Part 1
FORMAT is a convenient but expensive function - Part 2
You can use the SQL Server FORMAT function:
FORMAT(col1, 'dd/MM')
Check the demo here.
In such cases using char or varchar is not the best option as in those cases the underlying DB constraints that validate the integrity of the data do not kick in.
Best option is to use an arbitrary year and then put in a proper date, so for example for storing 01-Jan, the db column should store proper date with year as any arbitrary value, e.g. 2000. So your db should say 2000-01-01.
With such a solution you are still able to rely on the DB to raise an error if you tried month 13. Similarly sorting will work naturally as well.
Lets say I have a table Student with columns Name,DOJ,TOJ.
Inorder to enter date in mm/dd/yyyy format and timestamp in the format hh24:mm:ss I used ALTER SESSION SET NLS_DATE_FORMAT='MM/DD/YYYY' and ALTER NLS_TIMESTAMP_FORMAT='HH24:MI:SS' but i want to know an alternative solution to enter in this format without involving session. Please guide me through this.
CLICK HERE TO VIEW COLUMNS AND THEIR DATA TYPES
We store dates/times either in a DATE column (which is Oracle's inappropriate name for a datetime) or a TIMESTAMP column (which has more precision and can handle timezones, too). These types have no format. This is important, because thus comparing and sorting them in the database works fine, because the DBMS knows how to handle datetimes, while the users see the date in their format. I, for instance, have set my Windows to German, so I will see the datetimes in some German format, while you will see the same date in a format you are used to.
There are few situations where you want to store date and time separately. The reason is typically that you can set them null. A date without a time means "the whole day". A time without a date means "every day this time". But then you often want this even more advanced anyway ("every Tuesday and Wednesday", "every December 24", etc.) for which you need soemthing more sophisticated then just date and time split into two.
So, usually we just store date and time combined. For a precision down to seconds we use DATE. If we wanted them separately we'd have to think of an appropriate data type, because Oracle has no real date type and no time type either. So we'd either use DATE and ignore the date part or the time part or we use strings. The former solution is usually preferred, because you cannot mistakenly enter invalid data like February 30 or 23:66:00.
If you want to store formatted dates and times, you are talking about strings. I don't recommend this. Strings are not the appropriate data types for dates and times. And a format '01/02/2000' is ambiguous. Some people will read this as February 1, others as January 2.
If you wanted to do this, you would have to change the column types to VARCHAR2 and simply store values like '02/25/2021' and '13:28:56'.
But if you wanted to sort your data or compare dates/times then or just show them to a foreign user in a format they are used to, you would always have to convert them. E.g.:
select *
from mytable
order by to_date(doj || ' ' || toj, 'mm/dd/yyyy hh24:mi:ss');
I am afraid that to change default format you have no other option but to change NLS_DATE_FORMAT either in database level or session level.
But If your purpose is to show the date in a specific format in the front end then you can use to_char() function as below:
SELECT NAME, to_CHAR(DOJ,'dd/mm/yyyy'),to_CHAR(TOJ,'HH24:MI:SS') FROM table
To change the default date format in system level:
ALTER SYSTEM SET NLS_DATE_FORMAT='DD/MM/YYYY' scope=both;
You can also change the default date format at startup time with a login trigger to change the nls_date_format:
CREATE OR REPLACE TRIGGER CHANGE_DATE_FORMAT
AFTER LOGON ON DATABASE
call DBMS_SESSION.SET_NLS('NLS_DATE_FORMAT','YYYYMMDD');
I see a new data typeDATE being introduced in the BigQuery Web UI but not documented in https://cloud.google.com/bigquery/data-types.
Well DATE as such is not new but I have one major question. Unlike TIMESTAMP does DATE ignore timezone information after being stored.
Quoted text from TIMESTAMP documentation:
You can supply a timezone offset in your date and time strings, but
BigQuery doesn't preserve the offset after converting the value to its
internal format. If you need to preserve the original timezone data,
store the timezone offset in a separate column.
Also whats the expected input for this format. I have tried the known timestamp strings but it does not seem to work.
I see a new data typeDATE being introduced in the BigQuery Web UI but
not documented
Date type was introduced with Standard SQL - see Date type for details
Also whats the expected input for this format
Canonical format
'YYYY-[M]M-[D]D'
YYYY: Four-digit year
[M]M: One or two digit month
[D]D: One or two digit day
Note: The DATE type represents a logical calendar date, independent of time zone.
I am creating a custom audit log as a process in the Apex application I have developed.
Below is the code I have used to log the actions by the user when they use the application. The LOGON_DT and LOGOFF_DT will only need to be in a date format. However, QUERY_SEARCH_TIME will need the time.
INSERT INTO AUDIT_LOG
(USERNAME, ORDER_NO, ORDER_NAME, CUSTOMER_NAME, LOGON_DT, LOGOFF_DT, QUERY_SEARCH_TIME)
VALUES
(:APP_USER, :P10_ORDER_NO, :P10_ORDER_NAME, :P10_CUSTOMER_NAME, SYSDATE, SYSDATE,
SYSDATE(HH24:MI:SS));
The above code works perfectly when HH24:MI:SS is taken off, and I'm not sure where I'm going wrong with this?
Any guidance will be great. Thank you!
Oracle has it's own internal representation for a DATE datatype. You can't dictate its format in the way you are attempting.
It is common to apply a date format on retrieval, which you can do by applying the appropriate format mask as you convert to a string.
TO_CHAR(QUERY_SEARCH_TIME, 'HH24:MI:SS')
A DATE column already captures a time component. It may not be necessary to cut it off. And if you do, you do not want a DATE column as such a column will always capture a whole date, and what would be the point if you want only time.
To visualize the time component of a date you have to apply a format mask to it:
TO_CHAR(SYSDATE, 'HH24:MI:SS'). If you want to capture just that, the time, then change the datatype of the column to a VARCHAR2 type of sufficient length for the format mask you apply.
Read up on datetime datatypes here: Oracle documentation on datetime types
Read up on datetime format models here: Oracle documentation on format models
If you need time part of date only for output, you can use answer of Tom, but if you really need to store time part only, you can calculate it as
sysdate - trunc(sysdate)
How do I use an SQL statement on an sqllite database to insert the current date in UTC. I found the NOW function but what format is that in? This will be on mobile devices so everyone will have a different locale, however, I need a standard time format because the device will compare the dates with my server.
Also, is there a way to automatically update a 'modified' field when the data in the row is changed like you can in MySQL?
SELECT DATETIME('now') returns the current UTC datetime. See Date And Time Functions. You can use DATETIME DEFAULT CURRENT_TIMESTAMP with column declaration.
Format 11, the string 'now', is
converted into the current date and
time as obtained from the xCurrentTime
method of the sqlite3_vfs object in
use. Universal Coordinated Time (UTC)
is used
For the 'modified' field you can use a trigger.
You don't specify what you use to develop your application on. I prefer using QDate::toJulianDay and QDate::fromJulianDay in Qt to store dates in an SQLite database as an integer if I only need to store the date.