下午收到同事的报告,一张表被错误更新,没有加where 导致表的某个字段被全部更新。数据已经提交。还好通知的及时,只要数据还在回滚段,就可以查到到,想到了闪回查询,下面是具体的操作步骤
create table t_test_1 as
select * from t_test as of timestamp to_timestamp('2011-10-25 13:45:00','yyyy-mm-dd hh24:mi:ss');
select src from t_test_1;
.......................
10658103616692
10658103616692
10658103616692
10658103616692
10658103616692
...........................
数据不对,继续闪回
drop table t_test_1;
create table t_test_1 as
select * from t_test as of timestamp to_timestamp('2011-10-25 13:30:00','yyyy-mm-dd hh24:mi:ss');
select src from t_test_1;
..................
10658103633081
10658103623000
106581036 16692
10658103616624
10658103616625
10658103616635
..........................
就是这些数据,下面进行重命名表的操作
rename t_test to t_test_2;
rename t_test_1 to t_test;
数据成功恢复。