在SQL Server中，如何用另一個值替換秒值？

Question

如何更換秒部分？

2016-07-07 16:46:23.057 

我想替換23 00：

2016-07-07 16:46:00.057 

Answer 1

試試這個

DECLARE @Date datetime = '2016-07-07 16:46:23.057' 
DECLARE @NewSeconds int = 0 -- from 0 to 59 - what you want to replace the original seconds with 
DECLARE @NewDate datetime 

SET @NewDate = DATEADD(ss, @NewSeconds, DATEADD(ss, -DATEPART(ss, @Date), @Date)) 

SELECT @NewDate 

Answer 2

set @new_value = dateadd(s, -datepart(s, @old_value), @old_value) 

Answer 3

select CONVERT(varchar(10),getdate(),121) +' ' + right('00'+cast(DATEPART(HOUR,getdate()) as varchar(4)),2)+ ':' + right('00'+cast(DATEPART(MINUTE,getdate()) as varchar(4)),2)+ ':00:' + right('000'+cast(DATEPART(MS,getdate()) as varchar(4)),3)