Oracle清空表后如何恢复数据

有时候忘记备份数据，把数据清空了，或者删除了，这时候怎么恢复数据呢，使用下面sql即可，替换对应的table和column

INSERT INTO table1(column1,column2,column3
) SELECTcolumn1,column2,column3
FROMtable1
AS OF timestamp ( systimestamp - interval '12' hour ); -- 表示12小时之前的数据

更多oracle 闪回查询

---闪回查询SQL> select * from emp as of timestamp (systimestamp - interval '2' minute); ---查询emp表2分钟之前的数据SQL> select * from emp as of timestamp (systimestamp - interval '120' second); ---查询emp表120秒之前的数据SQL> select * from emp as of timestamp (systimestamp - interval '12' hour); ---查询emp表12小时之前的数据SQL> select * from emp as of timestamp (systimestamp - interval '12' day); ---查询emp表12天之前的数据SQL> select * from emp as of timestamp sysdate-2; ---查询emp表2天之前的数据SQL> select * from table_name as of timestamp to_timestamp('2023-05-22 10:00:00','yyyy-mm-dd hh24:mi:ss'); ---根据时间查询