直接上代码：
CREATE FUNCTION UNIX_TIMESTAMP (@ctimestamp datetime) RETURNS integer
AS
BEGIN
/* Function body */
declare @return integer
SELECT @return = DATEDIFF(SECOND,{d '1970-01-01'}, @ctimestamp)
return @return
END
CREATE FUNCTION from_unixtime (@ts integer) RETURNS datetime
AS
BEGIN
/* Function body */
declare @return datetime
select @return = DATEADD(second, @ts, {d '1970-01-01'})
return @return
END
用法
跟MySQL下的一样类似：
select dbo.UNIX_TIMESTAMP('2013-1-1')
select dbo.from_unixtime(2145000000)
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