.
              .
              .
              .
        set @orderID=''
 Begin Transaction T
 declare @errorInfo int
 set @errorInfo=0

 declare @IndexStr Varchar(3)
 declare @Index int
 select @Index=Count(Order_ID) from Orders
  where Year(Order_Date)=Year(getdate())
  and Month(Order_Date)=Month(getdate())
  and Day(Order_Date)=Day(getdate())
 if(@Index<9)
  set @IndexStr='00'+Cast((@Index+1) as varchar(3))
 else if (@Index>=9 and @Index<99)
  set @IndexStr='0'+Cast((@Index+1) as varchar(3))
 else
  set @IndexStr=Cast((@Index+1) as varchar(3))
 --print @IndexStr

 set @orderID= Cast(Year(getDate()) as varchar(4)) +Cast(MONTH(getDate()) as varchar(2))+Cast(DAY(getDate()) as varchar(4))+@IndexStr
 --print @orderID