Help me please with the next problem.
I have date time string in the next format(ISO 8601): 1999-12-31T23:59:59
and I need to cast it to TIMESTAMP value. The main problem in 'T' separator character.
I have tried next query:
SELECT TIMESTAMP_FORMAT('1999-12-31T23:59:59','YYYY-MM-DD HH24:MI:SS') FROM ROMAN.EMPLOYEE;
and use different format strings, such as, YYYY-MM-DDTHH24:MI:SS, YYYY-MM-DD"T"HH24:MI:SS.
Could you provide me correct way to cast this type of strings without any character replacement and substrings.
Thanks in advance!
There is no built-in function that can format a timestamp in ISO-8601 format in DB2 for Linux/UNIX/Windows.
As you have probably surmised, you can do this with REPLACE:
select
TIMESTAMP_FORMAT(REPLACE('1999-12-31T23:59:59','T',' '), 'YYYY-MM-DD HH24:MI:SS')
from
ROMAN.EMPLOYEE;
It's trivial to create a user defined function (UDF) to handle this formatting for you as well so you don't have to out this long string in every query.
It may also be possible to do it via XQuery with and xs:dateTime, although this would be even more code than just embedding REPLACE in the call to TIMESTAMP_FORMAT.
Related
I have Ship_Date as 12/14/2013 20:27 and defined as varachar datatype in the source table.How can I convert this to timestamp format and load as is 12/14/2013 20:27?I'm using CAST (SHIP_DATE AS TIMESTAMP(0) FORMAT 'MM/DD/YYYYHH:MI:SS') AS SHIP_DATE but terdata is throwing invalid timestamp error.Please help in resolving the issue
You were missing the B indicating a blank/space in your original cast. But Teradata casts chokes on a single digit month. You can add a leading zero using a RegEx:
Cast(RegExp_Replace(SHIP_DATE,'\b([\d])\b', '0\1') AS TIMESTAMP(0) FORMAT'dd/mm/yyyyBhh:mi')
select to_timestamp('12/14/2013 20:27','MM/DD/YYYY HH24:MI');
The problem with your cast as you have it written is you are telling Teradata you have seconds in your string when you don't. You can use:
select cast ('12/14/2014 20:27' as TIMESTAMP(0) FORMAT 'MM/DD/YYYYBHH:MI')
However, this still won't handle single digit months.
The issue here is the empty space between 2013 and 20 and the missing zeros for the seconds.
I did oreplace to remove the space and concatenation and it worked.
SELECT
CAST (
( OREPLACE('12/14/2013 20:27', ' ','') ||':00')
AS TIMESTAMP(0) FORMAT 'MM/DD/YYYYHH:MI:SS'
) AS SHIP_DATE
And the result is below:
My source is a file and loading into SQL Server table. I'm working on a scenario where i have to convert a string '2019-04-02T21:24:00.065' to informatica datetime format.
I tried below expression but some times its failing due to we are not receiving milliseconds from our source file in few occasions.
IIF(NOT ISNULL(DATEFIELD),TO_DATE(SUBSTR (DATEFIELD, 0, 10) || ' ' || SUBSTR(DATEFIELD, 12, 12), 'YYYY-MM-DD HH24.MI.SS.US'),NULL)
I'm looking for a permanent fix to handle all types of datetime formats regardless of what we receive in the file.
Well... I'm sorry to say, but there is no magic component that will recognize all possible date and time formats (including e.g. verbal in swahili).
You will need to detect the format for yourself. You can use a DECODE function, like e.g.:
DECODE(True,
IS_DATE(your_input_port, 'DD/MM/YYYY'), TO_DATE(your_input_port, 'DD/MM/YYYY'),
...)
If you are completely sure that only seconds/milliseconds are the missing part, you can check for length, if less than 12, use RPAD to the second part of your SUBSTR with missing format, or you can use decode as suggested by #maciejg and write code for all possible date formats.
Thanks for your inputs guys. Since we are not sure which date format we are receiving , we decided to go with a simple fix for this. I have changed the target field to varchar and simply replacing the T with ' ' value since this a staging mapping.
Again thanks for your time and inputs.
I am using this SQL query to convert my _Submission_date column which of type nvarchar(max) to datetime format:
SELECT
CAST(PSCData._SUBMISSION_DATE AS DATETIME2)
FROM
PSCData
I have tried every possible way but still its giving this error:
Conversion failed when converting date and/or time from character string.
The data inside my _Submission_Date is in this form:
"2017-8-21 21:13:55.00000"
"2017-9-21 14:13:55.00000"
When I run this query it works fine:
SELECT CAST('2017-08-25' AS DATETIME);
but with this format :
SELECT CAST('2017-9-21 14:13:55.00000' AS DATETIME);
I get the same error mentioned above.
Any suggestions that how I can solve this?
Found the solution. The actual problem was the double quotes around the string which was causing the error it can be solved like this:
update PscData
SET _SUBMISSION_DATE = REPLACE(_SUBMISSION_DATE,'"', '')
select CAST(PSCData._SUBMISSION_DATE as DATETIME2)
FROM PSCData
i.e: first use the REPLACE method to remove double quotes around the string than you can use the cast method and can easily convert the "varchar" type data to "datetime" format without any problem. Plus u have to use "datetime2" in the cast method as "datetime" will not work with it.
Thanks for the help btw :)
I need to convert a string formatted as MM/DD/YYYY HH:MI plus AM/PM, but can't find a complete reference to the format string to find how to specify the AM/PM part.
I would certainly appreciate information on how to do this, but would appreciate a link to a good source of documentation for this even more.
:EDIT
SELECT top 1
v.CalendarDateTime
,TO_TIMESTAMP(v.CalendarDateTime,'MM/DD/YYYY HH:MIAM') as CalendarDateTimeTS
--,CAST(TO_TIMESTAMP(v.CalendarDateTime,'MM/DD/YYYY HH:MIAM') AS TIMESTAMP(0) FORMAT 'MM/DD/YYYYBHH:MIBT') AS CalendarDateTimeTS2
12/03/2015 03:00AM 12/3/2015 03:00:00.000000
The commented out line produces a "DateTime field overflow" error.
You probably want TO_TIMESTAMP instead of TO_DATE.
The only bad thing about the Oracle function is the resulting datatype of TIMESTAMP(6) which can't be changed:
TO_TIMESTAMP('12/03/2015 03:00AM', 'MM/DD/YYYY HH:MIAM')
Using Teradata's FORMAT you can specify the timestamp precision, but it's less flexible than Oracle's, the string must match the format exactly:
CAST('12/03/2015 03:00AM' AS TIMESTAMP(0) FORMAT 'MM/DD/YYYYbHH:MIT')
On the Teradata site you'll find the (slow) online docu, e.g. TO_DATE formats or Teradata FORMATs. Of course you should download the full documentation CD for your release.
Please tell us at least which programming language are you using.
Normally it would be something like "MM/DD/YYYY HH:MI a" but we need to know first you language.
I insert my date/time data into a CHAR column in the format: '6/4/2015 2:08:00 PM'.
I want that this should get automatically converted to format:
'2015-06-04 14:08:00' so that it can be used in a query because the format of DATETIME is YYYY-MM-DD hh:mm:ss.fffff.
How to convert it?
Given that you've stored the data in a string format (CHAR or VARCHAR), you have to decide how to make it work as a DATETIME YEAR TO SECOND value. For computational efficiency, and for storage efficiency, it would be better to store the value as a DATETIME YEAR TO SECOND value, converting it on input and (if necessary) reconverting on output. However, if you will frequently display the value without doing computations (including comparisons or sorting) it, then maybe a rococo locale-dependent string notation is OK.
The key function for converting the string to a DATETIME value is TO_DATE. You also need to look at the TO_CHAR function because that documents the format codes that you need to use, and because you'll use that to convert a DATETIME value to your original format.
Assuming the column name is time_string, then you need to use:
TO_DATE(time_string, '%m/%d/%Y %I:%M %x') -- What goes in place of x?
to convert to a DATETIME YEAR TO SECOND — or maybe DATETIME YEAR TO MINUTE — value (which will be further manipulated as if by EXTEND as necessary).
I would personally almost certainly convert the database column to DATETIME YEAR TO SECOND and, when necessary, convert to the string format on output with TO_CHAR. The column name would now be time_value (for sake of concreteness):
TO_CHAR(time_value, '%m/%d/%Y %I:%M %x') -- What goes in place of x?
The manual pages referenced do not immediately lead to a complete specification of the format strings. I think a relevant reference is GL_DATETIME environment variable, but finding that requires more knowledge of the arcana of the Informix product set than is desirable (it is not the first thing that should spring to anyone's mind — not even mine!). If that's correct (it probably is), then one of %p and %r should be used in place of %x in my examples. I have to get Informix (re)configured on my machine to be able to test it.