This should be easy
I have a date column on table A
SELECT * FROM TABLEA
WHERE DTE = '01/02/2010'
The problem is that this is deployed onto US servers and I have no control over the date as its an arg.
How can I tell SqlServer to treat this date as being in that format??
I gave tried this:
SELECT *
FROM TABLEA
WHERE DTE = CONVERT(VARCHAR(10), '01/01/2010' , 101) AS [DD/MM/YYYY]
Your last try was almost correct, but it should have been
SELECT * FROM TABLEA WHERE AS_OF_DATE = CONVERT(DATETIME, '01/01/2010', 101)
Use a safe format. For dates (without a time component), the safe format is YYYYMMDD, e.g. today is '20100209'.
For datetimes, the safe format is YYYY-MM-DD'T'HH:mm:SS, where 'T' is the literal T, so right now is '2010-02-09T11:10:30'.
(When I'm saying safe, I mean that SQL Server always, unambiguously, knows how to convert these strings into datetime values)
Check out this reference article: The ultimate guide to the datetime datatypes
EDIT: Specifically what Tibor says about SET DATEFORMAT & SET LANGUAGE, since you mention that you have no control over the input format.
Another option is a double conversion (check performance when used as criteria):
select strTempNo, dtmTempDateStart,
convert(varchar(10), Convert(datetime, dtmTempDateStart, 103), 126) As UTCDate
I use 103 here as the data is already in UTC format but this works as well (UTC ISO8601 is 126).
If your dates are known to be always in American format you have to use 101.
Alternatively use 112 (ISO "safe" format) and cut the first 8 characters out of the string.
Data sample: (Sorry, don't have an American date table available)
521002 2008-09-1500:00:00.000 2008-09-15
580195 2008-04-1500:00:00.000 2008-04-15
530058 2008-09-2200:00:00.000 2008-09-22
580194 2008-04-0200:00:00.000 2008-04-02
500897 2008-07-0100:00:00.000 2008-07-01
500966 2008-09-2300:00:00.000 2008-09-23
Related
I have a table that contains date and the format is :'01-16-1989' which is mm-dd-yyyy but I want to insert to another table that has format like this: '1989-01-16' which is yyyy-mm-dd. What function can I use in the insert statement to do this?
insert into des_table
select date from source_table
How to update the second line in order to finish the date format conversion?
You can convert a string from mm-dd-yyyy format to a date using conversion type 110:
select convert(date, [date], 110)
from source_table
You can then convert this back to a string in the yyyy-mm-dd format using code 120:
select convert(varchar(10), convert(date, [date], 110), 121)
You can format date with DATE_FORMAT()
This is one way
SELECT DATE_FORMAT(date, '%Y-%m-%d') FROM source_table;
Source: http://dev.mysql.com/doc/refman/5.6/en/date-and-time-functions.html#function_date-format
Unless they are not actually datetime data types, your insert should be golden as it is.
Also, to answer this you should tell us what RDBMS you are using.
If you are using MySQL this should get you covered:
select DATE_FORMAT(current_date,'%y/%m/%d');
On the dates note you should keep all your dates
ISO formated
Since your column is already a DATE you don't need to do any conversions on the insert. If you want it to look a certain way in a specific query result, you can use CONVERT. There are many format options, but again, you don't need to bother with changing how it looks on the insert.
Here are some resources
https://msdn.microsoft.com/en-us/library/ms187928.aspx
https://technet.microsoft.com/en-us/library/ms187928(v=sql.105).aspx
http://www.w3schools.com/sql/func_convert.asp
How can I convert this 201402110544 to date(2014-02-11) in SQL server 2008?
You can cast as DATE data type (https://msdn.microsoft.com/en-us/library/bb630352(v=sql.100).aspx)
SELECT CAST(datetime_value AS DATE)
SELECT CAST(GETDATE() AS DATE) --> 2015-08-18
If you have a string to cast as DATE you can use:
SELECT CAST(LEFT('201402110544', 8) AS DATE)
You trim out the time part, by taking 1st 8 chars (YYYYMMDD) and will result a valid string to cast as DATE.
If this format is always the same, you can do this
DECLARE #d VARCHAR(20)='201402110544'
SELECT CAST(SUBSTRING(#d,0,9) as DATETIME)
Also have a look at The ultimate guide to the datetime datatypes which explains in detail about handling date-times
String to date conversion sure is a weakness of SQL Server. CONVERT does that, but can only deal with a number of given formats. So you must convert your string into such a format first and then convert it to date afterwards.
One such format is 120 = 'yyyy-mm-dd hh:mi:ss' which I think comes closest to yours. Another 102 = 'yyyy.mm.dd' suffices to get the date.
convert(
date,
concat(substring(datestring, 1,4), '.',
substring(datestring, 5,2), '.',
substring(datestring, 7,2)),
102)
from data;
SQL fiddle: http://www.sqlfiddle.com/#!3/9eecb7/3689
EDIT: I stand corrected. Horia is right; CAST supports 'yyyymmdd', so you can use it directly by merely cutting of the string's time part. This is more readable than my suggestion above, which makes CAST the better option in your case.
I have a column in sql server 2012. The column has date stored in varchar. The date data looks like this: dd/mm/yyyy
However there is a catch. The data that is within the column is in refusing to convert. Details investigation reveals that some are convertible to date mode and others are not (may be due to date stored as text mode). I tried to upload the data in date format. But it is also refusing to do so.
Sample Data:
Original Validation Check
10/03/1974 3/10/1974
02/02/1990 2/2/1990
16/05/1988 NULL
What should I do?
PS: Found out that some data stored in that column is not in date format, so it was refusing to convert. Thanks to Mr. #Digvijay Verma, he correctly predicted it and with his help I identified the error. Only removing these error and replacing those with valid dates will do the trick.
Regards,
Sadat
As per your comments, since you are certain about the string format (dd/mm/yyyy) you have in the column, I suspect your problem could be due to a leading/trailing space.
Try this with Ltrim(), Rtrim() and Isdate() functions. If you get any date 01/01/1900 (Assuming this date is not in your field) in the convertedDate field, you are having more troubles than spaces:
Select Original,
Case when IsDate(Ltrim(Rtrim(Original))) = 1
then Convert(date, Ltrim(Rtrim(Original)), 103)
else Convert(date, '19000101', 112) --date in yyyymmdd format
End ConvertedDate,
From yourTable
The date format you have in the db (dd/mm/yyyy) is 103.
So you should try
SELECT convert(datetime, '31/10/2013', 103)
As per your clarifications, it seems you need the data in yyyy-mm-dd format. so please try below.
SELECT convert(varchar(max),(convert(datetime, '31/10/2013', 103)), 120)
If the dates are in dd/mm/yyyy format, try
set dateformat dmy
select try_convert(datetime,date_col) from table
All other formats will be shown as NULL
you can try this:
SELECT Original,
case when left(Original,2) > 12 then convert(datetime, Original, 103)
else convert(datetime, Original, 101)
end
from t1
Here a small demo on SQLFiddle
I am using SQL server 2008 R2. I know I can use CONVERT with different format code as the third parameter to do the conversion to DATETIME first and CONVERT again to VARCHAR with another format code to change the display format.
The real problem now is I have mixed raw data in a single column. So my question is how do you write a single SELECT statement to display from mixed YYYY/MM/DD, DD/MM/YYYY all to DD/MM/YYYY?
I tried to use ISDATE() but it think 31/01/2013 is not a date while 01/01/2013 is a date. Now I could only think of to see if the YYYY is on the left or on the right to determine the correct input format, but I dont know how to write it out in a single SELECT statement.
Any procedure to change the format first then do a simple SELECT is not an option. I am not allowed to change the source.
Thank you
Why not just use string manipulations? Something like:
select (case when substring(d, 5, 1) = '/' -- YYYY/MM/DD
then right(d, 2)+'/'+substring(6, 2)+'/'+left(d, 4)
else d
end)
By the way, if you are choosing formats for dates when represented as strings, I highly recommend YYYY-MM-DD (or YYYY/MM/DD) because comparison operators work on them.
If you are sure that only those 2 formats (yyyy/mm/dd and dd/mm/yyyy) exist in the data, then you could probably get away with a CASE statement along the lines of:
CASE
WHEN (SUBSTRING(dateColumn, 5, 1) = '/') THEN CONVERT(datetime, dateColumn, 111)
ELSE CONVERT(datetime, dateColumn, 103)
END
my datetime field looks like this:
2011-02-07 06:51:32.000 (yyyy-mm-dd)
User input is in this format:
02-07-2011 (only the date)
This should be converted to:
02-07-2011 00:00:00.000
i tried CONVERT:
CONVERT(VARCHAR(10),myDateTimeField,113)
but this only works with date values not with datetime.
please help!
I used the following function:
CONVERT(datetime,Cast(myDateInput AS Char (10)), 105)
thanks for all your answers! and my apoligizes for changing my question!
select convert(varchar, myDateTimeField, 105) ...
Source: http://www.mssqltips.com/sqlservertip/1145/date-and-time-conversions-using-sql-server/ and http://msdn.microsoft.com/en-us/library/aa226054(v=sql.80).aspx
Crystal has a function called Date; it takes either YYYY, MM, DD or a datetime as arguments and returns a date.
So I would suggest you make a formula to change the date to a datetime and display it.
date( mytable.mydatetimevar )
You should then be able to format this date as you want with the normal date field formatting options.
An alternative method of doing it is using Crystal's DatePart function to pull out the month, year, day and then restructure as required.
Try this:
select DATEPART(mm, myDateTimeField) + '-' +
DATEPART(dd, myDateTimeField) + '-' +
DATEPART(year, myDateTimeField)
I don't think it's surprising that a DATETIME field carries time information ;)
In fact, you shouldn't alter the field itself, as you would lose the database engine's ability to use date/time related functions with this field.
(the format used is ISO 8601 which helps the engine to easily identify the single parts)
As others said, it's good practice to format the date when you are retrieving it, either in your SELECT statement or in your application. (for more tips regarding this we would indeed need the information what sql server and what appliccation language you are using).
try converting with Style ID - 110
CONVERT(VARCHAR(10),myDateTimeField,110)
Result will be: 02-07-2011