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21-30ÊÇʲôÒâ˼£¿×ֶεϰ¾Ídelete from table1 where col1>=21 and col1<=30
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delete from table1 where rowid in 
  (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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    begin
    close;
    commandtext:='select bgqxcode,count(*) wjsl from wscl_wsda_file where wjnd=:tnd group by bgqxcode'; ......

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id    name    parentid
1      aaa    null
14    bbb    1 ......

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