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https://stackoverflow.com/questions/12756769/sql-convert-datetime-and-subtract-hours
declare @createTime datetime = '2012-10-06 02:29:37.243'; -- original value, default formatting select @createTime; -- formatted select convert(varchar, @createTime, 100); -- subtract 4 hours, formatted select convert(varchar, dateadd(hour, -4, @createTime), 100); The query above that uses dateadd will always subtract 4 hours. If your goal is to convert an arbitrary datetime from UTC to local …
https://www.raiseupwa.com/lifehacks/how-do-i-subtract-hours-and-minutes-in-sql/
How do I subtract hours and minutes in SQL? Add 30 days to a date SELECT DATEADD (DD,30,@Date) Add 3 hours to a date SELECT DATEADD (HOUR,-3,@Date) Subtract 90 minutes from date SELECT DATEADD (MINUTE,-90,@Date) Check out the chart to get a list of all options.
https://ycsoftware.net/add-and-subtract-hours-to-t-sql-datetime/
Add to 1 hour to the Current Date. DATEADD(hh,1,getdate()) Subtract 1 hour to the Current Date. DATEADD(hh,-1,getdate()) Add 1 hour to the Current Time and returns just the time part. select Convert(varchar,( DATEADD(hh,-1,getdate())),8) Reference http://msdn.microsoft.com/en-us/library/ms186819.aspx
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/a3928517-b9ac-4af8-a48e-2d60ff648f0a/subtracting-hours-from-datetime
I would say something is resetting your value throughout the procedure, the sql here works as exected which I think is the way you explain it. declare @timedif int , @date datetime set @timedif = 12 set @date = '2012-01-01' SELECT (DATEADD(hh, - @TimeDif, @Date)) AS DateReturn.
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