ORACLE 重復數據修改其中一條

oracle更新bai數據兩du條以上相同zhi則只更dao新一zhuan條
update 表名shu t
set t.st = '1'
where rowidtochar(rowid) in
(select t2.r1
from (select rowidtochar(rowid) r1,
row_number() over(partition by t.id, t.na order by 1) r2
from 表名 t
where t.st = '0') t2
where t2.r2 = 1);