思路:
1.创建视图,查出重复记录.
2. 每10万一次commit,删除重复记录.
[@more@]--创建查询重复记录的视图
create or replace view v_large_table as
select row_id
from (
select rowid row_id,row_number() over (partition by col1 order by rowid ) rn
from large_table
)
where rn <> 1
--循环删除重复记录,10万一次提交.
create or replace procedure del_repeat
as
v_rowid varchar2(100);
v_num number(10);
cursor c1 is select row_id from v_large_table;
begin
open c1;
v_num :=0;
loop
exit when c1%notfound;
fetch c1 into v_rowid;
delete from large_table where rowid=v_rowid and rownum=1;
if v_num=100000 then
commit;
v_num :=0;
else
v_num :=v_num+1;
end if;
end loop;
commit;
close c1;
end;
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/62484/viewspace-918606/ ，如需转载，请注明出处，否则将追究法律责任。
