HH:MM:SS:Msec to HH:MM:SS in stored procedure - sql

Question

I have a stored procedure which update a table based on such calculation and the calculation is done as column name (Calendatedate) - (Current System Date Time) and update this information to a column (TimeSpent) and display the value in Hh:Mm:SS:Msec format.
The query is working fine but I want to update it in such a way so that the time spent should be only HH:MM:SS format. Please help me that how I remove that Msec from the time spent.
CREATE procedure St_Proc_UpdateTimeSpent
#timeEntryID int,
#status int output
as begin
set nocount on;
declare #Date dateTime;
set #Date=GETDATE();
update Production set TimeSpent=(SELECT CONVERT(VARCHAR(20),DateAdd(SS,Datediff(ss,CalendarDate, #Date)%(60*60*24),0),114)),
IsTaskCompleted=1
where productionTimeEntryID=#timeEntryID
set #status=1;
return #status;
end

Answer 1

You can just use style 108 instead of 114 in the CONVERT function to get only the hh:mm:ss:
CREATE PROCEDURE dbo.St_Proc_UpdateTimeSpent
#timeEntryID int,
#status int output
AS BEGIN
SET NOCOUNT ON;
DECLARE #Date DATETIME;
SET #Date = GETDATE();
UPDATE dbo.Production
SET TimeSpent = CONVERT(VARCHAR(20), DATEADD(SS, DATEDIFF(ss, CalendarDate, #Date)%(60*60*24),0), 108),
IsTaskCompleted = 1
WHERE
productionTimeEntryID = #timeEntryID
SET #status = 1;
RETURN #status;
END
See the excellent MSDN documentation on CAST and CONVERT for a comprehensive list of all supported styles when converting DATETIME to VARCHAR (and back)
BTW: SQL Server 2008 also introduced a TIME datatype which would probably be a better fit than a VARCHAR to store your TimeSpent values ... check it out!