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how to increment a date and time they are split in to fields

I need to do a sweep of a database and increment the start date time by x amount of hours. the hours to increment is derived in an earlier statement. basically i have two fields

START_DATE datetime
START_TIME datetime

I guess i need to cast them into a single field, increment it by the increment value and write it back, I would liked to achieve this in a single statement. Can anyone suggest how this statement might look?

Thanks in advance

1 Solution


declare @START_DATE datetime
declare @START_TIME datetime

set @START_DATE='2011-11-01'
set @START_TIME='20:00:00'

select CONVERT(datetime, CONVERT(varchar, DATEADD(hh, 10, @START_DATE+@START_TIME), 101)) as START_DATE,
CONVERT(datetime, CONVERT(varchar, DATEADD(hh, 10, @START_DATE+@START_TIME), 114)) as START_TIME


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