How to remove and recover Oracle table data submitted

In the Oracle database, if you accidentally delete the data, the data is how to restore it?

There are two methods: scn method and time stamp method

First, recover deleted data SQL syntax (recommended timestamp)

1 to remove and recover by scn submitted data

1) Get the current scn number of the database

　　　　select current_scn from v $ database; (sys switch to query the user or user system)

　　　　Queried scn number: 1499223

2) prior to the current number of queries scn scn

　　　　select * from table name as of scn 1499220; (determining whether to delete the data exists, if there is, then restore the data; if not, continue to shrink scn number)

3) recover deleted data and has been submitted

　　　　flashback table 表名 to scn 1499220;

2, by deleting the recovery time and the data submitted

1) to query the current system time

　select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual;

2) query data delete data point of time

　select * from table as of timestamp to_timestamp ( '2018-10-09 15:29:00', 'yyyy-mm-dd hh24: mi: ss'); (if not, continue to narrow)

3) recover deleted data and has been submitted

- Enable row movement (to solve the following problem statement error)

alter table 表名 enable row movement;

- restore data to a point in time

flashback table 表名 to timestamp to_timestamp('2018-10-09 15:29:00','yyyy-mm-dd hh24:mi:ss');

- Close the row movement

alter table 表名 disable row movement;

Second, the example (method) to recover deleted data

1, before deleting data table query data

- Query before deleting data table --- 
the SELECT  *  from Dxc_Goods;

2, delete data operations (132, 133), and view

- delete operation: 132,133-- 
the Delete  from Dxc_GOODS the WHERE MID in ( 132 , 133 );
 - submit (analog accidental deletion operation) 
the commit ;

View Results

3, undelete and data submitted (to delete the specified point in time, to ensure that this is the time before delete)

  - open row movement (to solve the following problem statement error) 
  the ALTER  the Table Dxc_Goods enable Row Movement NC Joining Module;
   - recovery of data some point in time 
   the Flashback the Table Dxc_Goods to  timestamp to_timestamp ( ' 2019-07-24 18:00:00 ' , ' YYYY-mm-dd HH24: mi The: SS ' );
   - closing row movement 
  ALTER  Table Dxc_Goods disable row movement;

After executing the query data (132,133 data has been restored)

PS:

Reference URL: https: //blog.csdn.net/qq_36460189/article/details/82983732

How to remove and recover Oracle table data submitted

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