How can I convert a Sql Server 2008 DateTimeOffset to a DateTime

Question

I\'m hoping to convert a table which has a DATETIMEOFFSET field, down to a DATETIME field BUT recalculates the time by taking notice of the offset.

Answer 1

In order to account for daylight savings time, I used the following:

CONVERT(
  DateTime, 
  SWITCHOFFSET(
    CONVERT(
      DateTimeOffset, 
      CONVERT(
        DateTime, 
        [time_stamp_end_of_interval], 
        120
      )
    ),
    DATENAME(
      TzOffset, 
      CONVERT(
        DateTime, 
        [time_stamp_end_of_interval], 
        120
      ) AT TIME ZONE 'Pacific Standard Time'
    )
  )
)
AS GOOD_PST

Note: time_stamp_end_of_interval is a varchar