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Logmnr has made many improvements after Oracle 9i. If you do not need to build a flat text file, you can analyze the log, which means you can analyze the log without modifying the utl_file_dir parameter, the problem of restarting the database caused by modifying the utl_file_dir parameter is avoided. In addition, it also began to support building dictionary information into online logs to analyze and archive logs in different regions.
Logmnr is useful when flashback cannot help. As long as archi
Because the staff turnover is not pleasant, the system engineer after leaving, because the company did not close its VPN in time, the database server (Linux 6.5 Oracle 11.2.0.1) account is not modified, and finally directly up to RM oracle_base to kill, The tragedy is that the Oradata catalogue is also inside, and it is even more tragic that all the data files are in it. That is, the database was completely delete
In Oracle Database Operations, accidental data deletion and table drop often occur. In the past, after this happens, developers often seek help from DBAs or administrators to use database backup and recovery to retrieve the data.
From oracle 9i, 10 Gb, you do not have to use backup to restore. There is a fast recovery method called flashback. You can use flashback query or flashback table.
I. FLASHBACK QUER
In database operations, when we accidentally delete tables, data, or views, we can use log mining to restore Oracle from Incomplete recovery, this article describes how to use log mining to recover data from incomplete Oracle recovery. Next we will introduce this process.The implementation of this method must meet two conditions: 1. DB works in archive mode; 2. T
disk partition table.After the floppy disk boots the system, run kv3000 and press the "F10" key to quickly test system parameters and hard disk partition tables. If the hard disk partition table is abnormal, kv3000 will prompt you to save the bad partition table to a floppy disk first, in case the operation fails, and
) ( PARTITION p0 VALUES LESS THAN (500), PARTITION p1 VALUES LESS THAN (1000), PARTITION p2 VALUES LESS THAN MAXVALUE)
? 2. If you want to modify a table partition with rules, note that only new partitions can be added. Do not delete them at will. Deleting a table partitio
Tags: char problem to_char AC Excel Flashback error nbsp dateSELECT * FROM tablename as of timestamp to_timestamp (' 2018-05-04 13:30:00 ', ' yyyy-mm-dd hh24:mi:ss ') Querying data at this point in time (It is possible because the system time and database time inconsistencies can not find the data so the time to query the database first Select To_char (sysdate, ' Yyyy-mm-dd hh24:mi:ss ') from dual According
Drive letter missing is a more common case of data recovery, it is important to note that the drive letter is missing and then do not rebuild the new partition. Protect the data loss scene and recover the data to the fullest extent. The specific recovery method to see the te
', ' 1998-12-25′ ');
Querying the data in P2
The code is as follows:
SELECT * from TR where purchased between ' 1995-01-01′and ' 2004-12-31′;
If you delete P2, all data under it is deleted while the P2 partition is deleted
The code is as follows:
ALTER TABLE T
分区找不到是比较常见的数据恢复案例,需要注意,分区找不到后不要再重建新的分区。保护好数据丢失现场,可以最大程度的恢复出数据。具体的恢复方法看正文了解。Tools/software: Star Data Recovery softwareStep 1: First Baidu Search and download the program opens, directly double-click the partition to be recovered, then unzip and then right-click the software icon to select the "Run as Administrator" software (if the XP system can be directly double-click to open the software).Step 2: After t
part of the extended partition.
3, logical partition
A logical partition is a contiguous area on a hard disk, except that each primary partition can be divided into one drive, each primary partition having its own separate boot block, which can be set to Hingi with Fdis
data recovery function, double-click to enter. Please carefully learn this software usage before the operation, I made the second mistake is here.
This is the software interface.
This column is the entire hard drive. The mouse selects the partition that you need to restore the data, the point restores the file, prompts the operation.
I am not very
Expansion of the C-disk after the drive letter is a more common case of data recovery, you need to be aware of the expansion of the C-disk after the drive letter is not rebuilt after the new partition. Protect the file lost scene, can restore the maximum degree of file. The specific recovery method to see the text to understand.Tools/Software: AuroradatarecoveryStep 1: First download and unzip the program o
Oracle partition table data migration and Management Automation Process
The following process is centered on the company's Oracle Database runtime environment. It is mainly written to achieve automation.Process completion tasks include1. automatically add partitions from the previous day to partition by Time2. automatically delete T_partition_1
add the Mount operation: # Try to mount/private1Wait/dev/block/privateMount ext4/dev/block/private/private1 wait noatime nosuid nodev barrier = 0Setupfs/dev/block/privateUmount/private1Exec/system/bin/logwrapper/system/bin/e2fsck-y/dev/block/privateExec/system/bin/busybox Mount-T ext4-O noatime, nosuid, nodev, barrier = 0, journal_checksum, noauto_da_alloc/dev/block/private/private1 Save and re-compile and package. After the firmware is installed, the private1 directory will appear in the r
kept in the same flash as the startup key.
Fifth step: Recover Password Save a dialog box appears asking if you want to perform system detection to confirm that you can read the startup key or recover the password at power-on, and check the "Run BitLocker system Check" checkbox.
Sixth step: Click the "Continue" button, the system will be prompted to reboot, after the reboot will be automatically detected
the program flow can not have any errors, Otherwise the data may be lost; another, PQ is foreign software, for the Chinese character set processing is very poor, in many cases PQ conversion success of the partition, Chinese characters into garbled.
So the best way I propose to redistribute space is the most old-fashioned, but definitely the most useful: find a piece of mobile hard drive to get the migrate
Diskgenius is a disk partition and data recovery software. Supports partition operations on GPT disks (using guid partitioned tables. In addition to basic disk management functions such as partition creation, deletion, and formatting, it also provides powerful functions such as searching for lost partitions, restoring
1, download and install the relevant data recovery software in Baidu.
2, installed after the software to open, at this time you can hover over the function of the mouse to view the corresponding functions. What we want to recover is the data that is missing from the hard disk partition.
3, click "Hard d
The partition assistant has the ability to erase the disk, it can completely delete the data on the disk, so that the data on the disk can not be erased or deleted by other data recovery software, which can achieve high data confi
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