ROW_NUMBER()分析函数生成一个排序列

--ROW_NUMBER()根据排序字段重新赋值本身的排序重新刷新
ALTER  proc UpdateTransportorder_proc
@OldVehicleStateType_ID int --修改之前的车辆类型
as
declare UpdateTransportorder_cursor cursor scroll for

select EMTinCar.ID, ROW_NUMBER() over(order by EMTinCar.VehicleOrder_ID
asc) as Rowno FROM EMTinCar where VehicleStateType_ID=@OldVehicleStateType_ID
ORDER BY EMTinCar.VehicleOrder_ID
open UpdateTransportorder_cursor
declare @ID INT ,@Rowno INT,@VehicleOrder_ID INT
FETCH first from UpdateTransportorder_cursor into @ID,@Rowno

WHILE @@fetch_status=0
begin
Update EMTinCar Set VehicleOrder_ID=@Rowno Where ID=@ID    --修改行
fetch next from UpdateTransportorder_cursor into @ID,@Rowno    --移动游标字段必须跟查询的结果集一致
end

CLOSE UpdateTransportorder_cursor

DEALLOCATE UpdateTransportorder_cursor