oracle sql 重复记录 只显示一条 ,显示 时间最近 或id 最大,同时显示其他列

挑选出number最大的

select * 
from biao b 
where not exists(select * from biao where b.name=name and b.number<number)
order by id desc

挑选出时间最近的

select * 
from biao b 
where not exists(select * from biao where b.name=name and b.eventtime<eventtime
)
order by id desc