select *
from tab
where exists (select 1
from (select distinct a from tab order by a) t
where rownum <= 100
and t.a = tab.a)
此意?
from tab
where exists (select 1
from (select distinct a from tab order by a) t
where rownum <= 100
and t.a = tab.a)
此意?
请问我想更新这些数据怎么办啊
请问我想更新这些数据怎么办啊更新 ? 你要怎么更新