declare @min as int
declare @s as varchar(255)
set @min = 1
set @s = '0:'+right('0'+ cast(@min as varchar),2)+':0' 

waitfor delay  @s

--update data

------解决方案--------------------
写个存储过程，关键有以下代码：
waitfor delay '00:30:00'  --等待30分钟
update ...