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Data splitting-Management and Maintenance of Mysql partition tables
For more information about Mysql partition tables, see:
Http://blog.csdn.net/jhq0113/article/details/44592865
For details about how to create a Mysql Partition Table, refer:
Http://blog.csdn.net/jhq0113/article/details/44593511
As mentioned above, Mys
log to the SHUA2, which is the database right-click Task.If you fill in, first fill in the beginning of the backup log C:\shua_log.bak, and then tick [restore], the most important thing is to choose a point in time, but this point of time can not select milliseconds, so I chose 29 seconds, This time will restore the data 29 seconds ago, and my data is deleted fr
database is relatively large, this restore to wait a long time, go out to suck a few fresh air, the merit will be gaocheng.3. After the database restore is successful, this stateDisplay (Restoring ... ), restore the transaction log to the SHUA2, which is the database right-click Task.If you fill in, first fill in the beginning of the backup log C:\shua_log.bak, and then tick [restore], the most important thing is to choose a point in time, but this point of time can not select milliseconds, so
Recovering from accidental deletion of data in SQL Server is not a difficult task to recover from the transaction log. However, this recovery requires two prerequisites:1. There is at least one full backup of the database before it is mistakenly deleted.2. The recovery model of the database (Recovery mode) is "full".There are three scenarios for both of these pre
suck a few fresh air, the merit will be gaocheng. 3. After the database restore is successful, this state Display (Restoring ... ), restore the transaction log to the SHUA2, which is the database right-click Task. If you fill in, first fill in the beginning of the backup log C:\shua_log.bak, and then tick [restore], the most important thing is to choose a point in time, but this point of time can not select milliseconds, so I chose 29 seconds, This time will restore the
Description of duplicate data instances in a dataset deleted from the SQL Server database, and description of server instances
In SQL Server database operations, when the result set in the table meets certain rules, we think it is duplicated data, and the duplicated data needs to be
recover data that was delete
Suppose the table name is: Table_delete
View System Current time
--Get the system current timeSelect To_char (sysdate, ' Yyyy-mm-dd hh24:mi:ss ') from dual;
View the data in this table at a point in time before deleting data
SELECT * from Table_delete
Label: -- Turn on line move function
ALTER TABLE tablename ENABLE row movement;
-- Restore table data at a point
in time of deletion or modification Table to timestamp to_timestamp ('2016-05-07/17:01:50',' YYYY-MM-DD hh24:mi:ss');
-- Note: Turn off the line movement function after recovery ALTER TABLE DISABLE row movement; 1, the query table data as follows: Select T.* from Z_test tDN sysdate1 abcde
Tags: style color using IO strong data ar problemFlashback query ( flash back ) principleBased on the undo information, Oracle uses the undo data, similar to the consistent read method, to place the table at a point in time ( or SCN) before deletion to retrieve the data.Flashback query ( flash back ) premise:Sql> show parameter undo;NAME TYPE VALUE------------------------------------ ----------- ---------
Application Environment: A table is accidentally deleted. At this time, I cannot restore the entire database, which is too troublesome. So now I will copy the data file from the new database to restore it. Therefore, Oracle cannot only restore a part of the data file when restoring the file, because oracle must ensure that the
Missing partition data recovery method?
Partitions on a computer are often lost because the hard disk partition table is corrupted or tampered with, so that the operating system cannot find and display the partition based on the record information in the partitioned table, and the partitioned
Environment: the database is in Open state, then rm-rf users. dbf (delete users tablespace), and finally retrieve the users. dbf file.
When replying, the reply method has little to do with the database version (because it is a physical file), but has a certain relationship with the operating system, such as Red hat Linux and Solaris Linux.
The following is an example:
Delete users tablespace.1. First, go to Sqlplus and execute the SQL statement:
Select name from v $ datafile;NAME--------------
filled in, first fill in the log c: \ shua_log.bak, and then select [restore]. The most important thing is to select a time point. Unfortunately, this time point cannot be set to milliseconds, so I chose 29 seconds. At this time, the data from the past 29.0 seconds will be restored, and my data will be deleted from 29.880 seconds. Therefore, I chose 29 seconds;
1. No recovery of data files:
In the afternoon in the operation of the database, accidentally will look at the uncomfortable file deleted, press the return button before remembering that this is an Oracle database data file. Fortunately this database is a test, data file lost relationship is not big, but still surprise
Q: Why do some "completely" deleted data can still be found back to recover it?
A: Some friends will be surprised: I clearly deleted the data, and emptied the Recycle Bin, why can I find it back? This has to start with the principle of recording
choose the appropriate data recovery model. Here users choose "U disk mobile phone camera card Recovery" mode, automatically into the next step.
Step Fourth: Select the directory where you want to recover the data.
Fifth step: Software into the scanning phase.
Step Sixth: After the scan is finished, the software lists all t
Oracle 10 Gb Deleted Data Query methods (1) as of timestamp eg. SQL code select * from t_table as of timestamp (sysdate-1/24) where... note: The table alias (2) as of scn SQL code SQL> select dbms_flashback.get_system_change_number from dual; GET_SYSTEM_CHANGE_NUMBER -------------------- 1859181 -- if you do not know the exact scn, try a smaller SQL statement> select count (*) from t_table as of scn 1800000
OS:Oracle Linux Server Release 5.7Db:Oracle Database 11g Enterprise Edition Release 11.2.0.3.0-64bit ProductionFirst create the Yoon databasesql> Create Tablespace Yoon datafile '/u01/oracle/oradata/yoon/yoon01.dbf ' size 50m;Tablespace created.Sql> create user Yoon identified by Yoon Default Tablespace yoon;User created.Sql> Grant DBA to Yoon;Grant succeeded.Sql> CREATE TABLE Yoon.yoon as SELECT * from Scott.emp;Table created.Accidental deletion of data
When the program runs wrong, the entire table is not there, and before there is no backup good! This egg hurts, this is the production server, the data inside can not be lost ah!
The server is Linux, I am not very familiar with, also do not know where MySQL installed.
But, Google, found that a lot of people have a fool like me once, but there is little to see the specific solution (there is said to use the hard disk software to r
Oracle restores accidentally deleted data table records. If no truncate statement exists, you can choose to recover the table records based on the transaction commit time. The general steps are as follows: www.2cto.com 1. First query from the flashback_transaction_query view. The view provides the table name, transaction commit time, UNDO_ SQL, and other fields f
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