oracle去重

create table tmp_table3
as
(SELECT seqno
FROM (SELECT t.seqno,ROWID,
ROW_NUMBER() OVER(PARTITION BY title, uin ORDER BY createtime) DUP
FROM calendar_info t
where isdelflag = 0
and specialtype = 1
--and uin = '30647'
and comefrom = 12)
WHERE DUP > 1);
--删除邀请表
delete calendar_invite_info
where calseqno in (select seqno from tmp_table3);
--更新变更表
update CALENDAR_SYNC_UPDATE
set token       = calendar_sync_update_token.nextVal,
action_type = 2,
updateTime  = sysdate
WHERE calseqno IN (select seqno from tmp_table3);
--删除活动表
delete calendar_info
where seqno in (select seqno from tmp_table3);