-----delete误删除恢复
---1.查询恢复哪个时间点的数据
select count(1) from t_imp_zhujian as of timestamp to_timestamp(\'2018-06-12 15:20:15\',\'yyyy-mm-dd hh24:mi:ss\');
---2.启用行移动功能
alter table t_imp_zhujian enable row movement;
----3.再恢复那个时间点的数据
flashback table t_imp_zhujian to timestamp to_timestamp(\'2018-06-12 15:20:15\',\'yyyy-mm-dd hh24:mi:ss\');