DATETIME类型和BIGINT 类型互相转换

SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO -- ============================================= -- Author: GGA -- Create date: 2013-03-28 -- Description: 将时间类型转化成BIGINT，返回指定时间 -- 到-01-01 08:00:00.000的毫秒数 -- ============================================= CREATE FUNCTION [dbo].[ufn_GetMSIntFormTime] ( @dt DATETIME ) RETURNS BIGINT AS BEGIN -- Declare the return variable here DECLARE @dtInt BIGINT SELECT @dtInt=DATEDIFF(SECOND , '1970-01-01 08:00:00.000' , @dt ) --秒数 set @dtInt = @dtInt*1000 + DATEPART(MILLISECOND,@dt) -- 毫秒数 RETURN @dtInt END GO

SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO -- ============================================= -- Author: GGA -- Create date: 2013-03-28 -- Description: 根据毫秒数计算出时间 -- ============================================= CREATE FUNCTION [dbo].[ufn_GetTimeFormMSInt] ( @msINT BIGINT ) RETURNS DATETIME AS BEGIN DECLARE @secInt BIGINT DECLARE @leftMsInt BIGINT SET @secInt=@msINT/1000; SET @leftMsInt=@msINT%1000; DECLARE @date DATETIME SET @date = DATEADD(SECOND,@secInt,'1970-01-01 8:00:00:000') SET @date = DATEADD(MILLISECOND,@leftMsInt,@date) RETURN @date END GO