问题描述
我希望将具有 DATETIMEOFFSET
字段的表转换为 DATETIME
字段,但重新计算通过注意偏移的时间。这实际上将值转换为 UTC
。
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. This, in effect, converts the value to UTC
.
例如。
CreatedOn:2008-12-19 17:30:09.0000000 +11:00
这将被转换为
CreatedOn:2008-12-19 06:30:09.0000000
或
CreatedOn:2008-12-19 06:30:09.0000000 + 00:00
< - 这是一个 DATETIMEOFFSET
,但 UTC
。
CreatedOn: 2008-12-19 06:30:09.0000000 + 00:00
<-- that's a DATETIMEOFFSET
, but UTC
.
Cheers:)
推荐答案
使用几乎任何样式进行转换都会导致将datetime2值转换为UTC 。
此外,从datetime2到datetimeoffset的转换只是将偏移设置为 +00:00
,如下所示,因此它是一种快速的转换方式从 Datetimeoffset(offset!= 0)
到 Datetimeoffset(+00:00)
Converting using almost any style will cause the datetime2 value to be converted to UTC.
Also, conversion from datetime2 to datetimeoffset simply sets the offset at +00:00
, per the below, so it is a quick way to convert from Datetimeoffset(offset!=0)
to Datetimeoffset(+00:00)
declare @createdon datetimeoffset
set @createdon = '2008-12-19 17:30:09.1234567 +11:00'
select CONVERT(datetime2, @createdon, 1)
--Output: 2008-12-19 06:30:09.12
select convert(datetimeoffset,CONVERT(datetime2, @createdon, 1))
--Output: 2008-12-19 06:30:09.1234567 +00:00
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