我有一个联接查询
SELECT vs.Id as 'VitalId', ms.PatientId as 'PatientId', ms.CustomerId as 'CustomerId', ms.CreatedUtc
from A1 a
join B1 b
on a.CreatedUtc = b.concat(concat(convert(date,S.CreatedUtc),':'),
datepart(hour,S.CreatedUtc))
实际上我想将a.CreatedUtc映射到日期和时间到b表(即:-B2)。 这个查询有效吗?因为当我运行此查询时,没有插入记录。
有人可以告诉我如何使用ON子句从Datetime列中仅获取日期和时间吗?
答案 0 :(得分:1)
这是您想要的吗?
select vs.Id as VitalId, ms.PatientId as PatientId,
ms.CustomerId as CustomerId, ms.CreatedUtc
from A1 a join
B1 b
on convert(date, a.CreatedUtc) = convert(date, S.CreatedUtc) and
datepart(hour, a.CreatedUtc) = datepart(hour, S.CreatedUtc);