这个语句该怎么写，有代码
Select top 1 TotalAddMoney,TotalTollMoney from ( Select top 1 TotalAddMoney,TotalTollMoney,ChangeDate from cntMoneychange where Userid = '00000001' order by ChangeDate desc
Union Select top 1 TotalAddMoney, TotalTollMoney,StCardDate from Tolldetail where cardid = '00000001' order by StCardDate desc ,stcardtime desc ) a order by TotalTollMoney desc


上面代码在2005运行正常，但是在2000报错
去掉 stcardtime desc 这个后2000 运行正常，但是去掉后得到的值不是我要的

现在这个的意思是我从两张表取数据 按时间排序 取得值后 组合两张表，然后再从这张表里面按大小排序 取得较大的那个值

还有其他写法吗，我是菜鸟 求救 谢谢了
[解决办法]
那用临时表吧,把
select ...
union
select ...
这个查询插入到临时表中
[解决办法]
Select top 1 TotalAddMoney,TotalTollMoney from ( Select top 1 TotalAddMoney,TotalTollMoney,ChangeDate from cntMoneychange where Userid = '00000001' order by ChangeDate desc
Union Select top 1 TotalAddMoney, TotalTollMoney,StCardDate as ChangeDate from Tolldetail where cardid = '00000001' order by StCardDate desc ,stcardtime desc ) a order by TotalTollMoney desc