datetime format in sql server 2008 - sql-server

Question

I have used below code to convert a datetime to string,
DECLARE #StartDate datetime = '08/07/2015 12:10 AM'
set #StartDate = dateadd(hour,12, #StartDate);
select CONVERT(VARCHAR(10),#StartDate, 101) + RIGHT(STUFF(CONVERT(VARCHAR(32), #StartDate,100), 18, 0, ' '),8)
but I am getting output as "08/07/201512:10 PM" , there is no space between date and time, How can I correct this?

Answer 1

If i correctly understood your problem then there is small correction required in your code. I added +' '+ i.e. a blank space between your date convert and right stuff. Complete code is as given below.
DECLARE #StartDate DATETIME = '08/07/2015 12:10 AM'
SET #StartDate = DATEADD(HOUR,12, #StartDate);
SELECT CONVERT(VARCHAR(10),#StartDate, 101) +' '+
RIGHT(STUFF(CONVERT(VARCHAR(32),#StartDate,100), 18, 0, ' '),8)
Result
08/07/2015 12:10 PM
i.e. space between date and time also space between 12:10 and PM
To cover new case provided :
DECLARE #StartDate DATETIME = '08/07/2015 2:10 AM'
SET #StartDate = DATEADD(HOUR,12, #StartDate);
SELECT CONVERT(VARCHAR(10),#StartDate, 101) +' '+
LTRIM(RIGHT(STUFF(CONVERT(VARCHAR(32),#StartDate,100), 18, 0, ' '),8))
Result
08/07/2015 2:10 PM
i.e. no extra space when time is like 2:10 PM

Answer 2

Here is one way to do it:
DECLARE #StartDate datetime = '2015-08-07T00:10:00';
SET #StartDate = dateadd(hour,12, #StartDate);
SELECT #StartDate As StartDate,
CONVERT(CHAR(10), #StartDate, 101) + ' ' + -- DateString,
SUBSTRING(CONVERT(CHAR(19), #StartDate, 100), 13, 5) + ' ' + -- TimeString
RIGHT(CONVERT(CHAR(19), #StartDate, 100), 2) As DateString -- AM/PM
Result:
StartDate DateString
----------------------- -------------------
2015-08-07 12:10:00.000 08/07/2015 12:10 PM

Answer 3

The following snippet will produce the output you've indicated in the question.
SET DATEFORMAT MDY;
DECLARE #StartDate DATETIME = '08-07-2015 12:10 AM';
SET #StartDate = DATEADD(HOUR, 12, #StartDate);
SELECT CONVERT(VARCHAR, #StartDate, 103) + ' ' +
CONVERT(VARCHAR, CAST(#StartDate AS TIME), 108) +
CASE WHEN DATEPART(HOUR, #StartDate) < 12 THEN ' AM' ELSE ' PM' END;
N.B. As others have pointed out, you would be better off using ISO format for input dates.
Updated dateformat from DMY to MDY and explicitly adding AM/PM to the end.