How to change default systemdate from ymd to dmy

Question

Can somebody help me to change the default systemdate from ymd to dmy? These must be for always the default format !! How?

Answer 1

SET DATEFORMAT DMY;

GO

RECONFIGURE

GO

DBCC USEROPTIONS

SELECT GETDATE()

Answer 2

SET DATEFORMAT:

Sets the order of the month, day, and year date parts for interpreting date, smalldatetime, datetime, datetime2 and datetimeoffset character strings.

[Note: This is often not the way to solve the problem of interpreting dates. Datetimes should not be stored a strings if you can avoid it (use a datetime or date column instead). If you have to store in a string form, use an ISO 8601 format which is basically of the form YYYYMMDD ]

Example from MSDN:

-- Set date format to day/month/year.
SET DATEFORMAT dmy;
GO
DECLARE @datevar datetime2 = '31/12/2008 09:01:01.1234567';
SELECT @datevar;
GO
-- Result: 2008-12-31 09:01:01.123
SET DATEFORMAT dmy;
GO
DECLARE @datevar datetime2 = '12/31/2008 09:01:01.1234567';
SELECT @datevar;
GO
-- Result: Msg 241: Conversion failed when converting date and/or time -- from character string.
GO

Answer 3

It's possible to set the default date format for the current login by changing the default language.

For month/day/year:

ALTER LOGIN [MyUser] WITH DEFAULT_LANGUAGE = us_english
select CAST('01-06-2011' as datetime)
-- 2011-01-06 00:00:00.000

Or for day/month/year:

ALTER LOGIN [MyUser] WITH DEFAULT_LANGUAGE = British
select CAST('01-06-2011' as datetime)
-- 2011-06-01 00:00:00.000

You can choose from any of the languages listed in sys.syslanguages. Changes won't take effect until you login again.