Studying SQL Server there is something I am not sure of:
A datetime field with the value: 2012-02-26 09:34:00.000
If I select out of the table using:
CAST(dob2 AS VARCHAR(12) ) AS d1 It formats it as: Feb 26 2012
What I am unsure of his how or why SQL Server formats DateTime like that. If you use datetime2 it does not - anyone know why?
The default date format depends on the language setting for the database server. You can also change it per session, like:
set language french select cast(getdate() as varchar(50)) --> févr 8 2013 9:45AM Compatibility Supports Says that Under compatibility level 110, the default style for CAST and CONVERT operations on time and datetime2 data types is always 121. If your query relies on the old behavior, use a compatibility level less than 110, or explicitly specify the 0 style in the affected query.
That means by default datetime2 is CAST as varchar to 121 format. For ex; col1 and col2 formats (below) are same (other than the 0s at the end)
SELECT CONVERT(varchar, GETDATE(), 121) col1, CAST(convert(datetime2,GETDATE()) as varchar) col2, CAST(GETDATE() as varchar) col3 --Results COL1 | COL2 | COL3 2013-02-08 09:53:56.223 | 2013-02-08 09:53:56.2230000 | Feb 8 2013 9:53AM FYI, if you use CONVERT instead of CAST you can use a third parameter to specify certain formats as listed here on MSDN
try this:
select convert(varchar, dob2, 101) select convert(varchar, dob2, 102) select convert(varchar, dob2, 103) select convert(varchar, dob2, 104) select convert(varchar, dob2, 105) select convert(varchar, dob2, 106) select convert(varchar, dob2, 107) select convert(varchar, dob2, 108) select convert(varchar, dob2, 109) select convert(varchar, dob2, 110) select convert(varchar, dob2, 111) select convert(varchar, dob2, 112) select convert(varchar, dob2, 113) refernces: http://msdn.microsoft.com/en-us/library/ms187928.aspx
In MS SQL Server you can do:
SET DATEFORMAT ymd case when isdate(inputdate) = 1 then convert(datetime, cast(inputdate,datetime2), 103) else case when isdate(inputdate) = 0 then convert(datetime, cast(inputdate,datetime2), 103) This is my favorite use of 112 and 114 select (convert(varchar, getdate(), 112)+ replace(convert(varchar, getdate(), 114),':','')) as 'Getdate() 112 + 114 or YYYYMMDDHHMMSSMSS'
Result: Getdate() 112 + 114 or YYYYMMDDHHMMSSMSS
20171016083349100