删除数据前表中记录
1> select t.*, t.rowid from vt_temp_test;
1 1 2 3.00 4.00
2 5 6 7.00 8.00
3 9 10 11.00 12.00
4 13 14 15.00 16.00
2 5 6 7.00 8.00
3 9 10 11.00 12.00
4 13 14 15.00 16.00
记录原数据完整时间点
2> select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual;
2> select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual;
1 2009-01-08 09:23:53
删除表中记录
3> delete from vt_temp_test;
3> delete from vt_temp_test;
找回原数据完整时间点数据
4> select * from vt_temp_test as of timestamp to_timestamp('2009-01-08 09:23:53', 'yyyy-mm-dd hh24:mi:ss');
4> select * from vt_temp_test as of timestamp to_timestamp('2009-01-08 09:23:53', 'yyyy-mm-dd hh24:mi:ss');
1 1 2 3.00 4.00
2 5 6 7.00 8.00
3 9 10 11.00 12.00
4 13 14 15.00 16.00
2 5 6 7.00 8.00
3 9 10 11.00 12.00
4 13 14 15.00 16.00
插入丢失数据到原表
5> insert into vt_temp_test select * from vt_temp_test as of timestamp to_timestamp('2009-01-08 09:23:53', 'yyyy-mm-dd hh24:mi:ss');
5> insert into vt_temp_test select * from vt_temp_test as of timestamp to_timestamp('2009-01-08 09:23:53', 'yyyy-mm-dd hh24:mi:ss');
验证数据恢复情况
6> select * from vt_temp_test
6> select * from vt_temp_test
1 1 2 3.00 4.00
2 5 6 7.00 8.00
3 9 10 11.00 12.00
4 13 14 15.00 16.00
2 5 6 7.00 8.00
3 9 10 11.00 12.00
4 13 14 15.00 16.00
---- 此时表明数据已完全恢复到原数据完整时间点的数据 ----
#### 注：当执行 truncate table vt_temp_test 时，就无法恢复数据，查找当时数据会报错：ORA-01466 unable to read table - table definition has changed。drop table vt_temp_test则更不可恢复 ####