sql server 2005 - SQL: Convert GMT in seconds to DateTime -

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i have table 2 columns of gmt time in seconds, , offset in minutes this:

  select top 1 starttime, offset mytable;   1247242537  -420 -- example

what sql function can use convert datetime in yyyy-mm-dd hh:mm:ss timestamp? sql using sql server 2005.

this should it, assuming epoch date 1/1/1970 (usually gmt seconds, need confirm)

select dateadd(ss,1247242537+(-420*60),'1/1/1970')   == >  2009-07-10 09:15:37.000

for code, use

select dateadd(ss,starttime+(offset*60),'1/1/1970') thetime mytable

be sure find test cases make sure epoch date expected. basically, gmt time number of seconds past 1/1/1970 12:00am, dateadd handles part. offset number of minutes different gmt, multiply 60 seconds , adjust value dateadd accordingly


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