MySQL怎么把多个max()得到的值进行排序

SELECT MAX(Degree) s FROM Score GROUP BY SNO HAVING COUNT(cno)>1 ORDER BY s DESC LIMIT 1

select max(id) id, send_id, receiver_id

from messages

where receiver_id='3'

group by send_id, receiver_id

order by id desc

limit 0,10

例子语句(表名TAB1，时间字段D1,D2,D3,D4,D5)：

SELECT GREATEST(D1,D2,D3,D4,D5), ......

FROM TAB1

ORDER BY 1 DESC

说明，需要使用GREATEST函数，不能用MAX，MAX是计算列最大值的。

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