Question

我很抱歉，这很简单，我还是SQL的新手，每天都在学习。我想做的是查询

SELECT ProjectName,
       RequestNumber,
       ContactId,
       ContactFirstName,
       ContactLastName,
       RequestReceivedDate,
       RequestCloseDate,
       Category,
       SubCategory,
       AssignedResourceId,
       OwningResourceId,
       RequestSource,
       ClosedImmediatelyFlag,
       RequestStatusCode
FROM dbo.system_requests;

但是我的RequestReceivedDate和RequestCloseDate关闭了5个小时。我在使用供应商数据库时无法创建函数，因此希望在我的select语句中将UTC转换为本地时间，只是不确定这样做的最佳方法？

有想法吗？

Answer 1

SQL Server 2016通过AT TIME ZONE'UTC'语句支持时区。您可以这样做：

SELECT ProjectName,
       RequestNumber,
       ContactId,
       ContactFirstName,
       ContactLastName,
       RequestReceivedDate AT TIME ZONE 'UTC',
       RequestCloseDate AT TIME ZONE 'UTC',
       Category,
       SubCategory,
       AssignedResourceId,
       OwningResourceId,
       RequestSource,
       ClosedImmediatelyFlag,
       RequestStatusCode
FROM dbo.system_requests;

您可以在Google上搜索“ AT TIME ZONE”。

Answer 2

所以我最终这样做了，它奏效了，给了我我想要的东西：

           SELECT CONVERT(
                             DATETIME,
                             SWITCHOFFSET(
                                             CONVERT(DATETIMEOFFSET, system_requests.RequestReceivedDate),
                                             DATENAME(TzOffset, SYSDATETIMEOFFSET())
                                         )
                         ) AS RequestReceivedDate
       ),
       (
           SELECT CONVERT(
                             DATETIME,
                             SWITCHOFFSET(
                                             CONVERT(DATETIMEOFFSET, system_requests.RequestCloseDate),
                                             DATENAME(TzOffset, SYSDATETIMEOFFSET())
                                       )
                         ) AS RequestClosedDate

如何将日期时间从UTC转换为本地时间

2 个答案: