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(select rd from (
select rowid rd,rownum rn from table1)
where rn>=21 and rn<=30)
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delete from table1 where rn in
(
select rn
from
(
select row_number() over(partition by ??(ÄãÒªÅÅÐòµÄ×Ö¶Î) rn order by rowid
from table1
)
where rn>=21 and rn <=30
)
up
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b b.1
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id name parentid
1 aaa null
14 bbb 1
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