Methods to retrieve deleted data in MySQL include: 1) Binary log recovery; 2) Transaction log file recovery; 3) Rollback table; 4) Third-party tools. The conditions include: binary log or transaction log recording is enabled, and backup is available. To prevent data loss, it is recommended to back up the database regularly.
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MySQL method to retrieve deleted data
Get straight to the point:
There are several methods to retrieve deleted data in MySQL:
Detailed expansion:
1. Binary log recovery
- If binary logging is enabled, you can use the MySQLbinlog tool to extract deleted data from the binary log.
- Find the binary log file containing the deletion operation.
- Use the MySQLbinlog tool to extract deleted records.
- Use the import tool to reload the extracted records into the database.
2. Transaction log file recovery
- If transaction logging is enabled, you can use the ib_logfile1 and ib_logfile2 files to recover deleted data.
- Stop the MySQL server.
- Copy the ib_logfile1 and ib_logfile2 files.
- Use the MySQLbinlog tool to extract deleted records from transaction log files.
- Use the import tool to reload the extracted records into the database.
3. Rollback the table
- If you create a backup of the table before the delete operation, you can use the backup to rollback the table.
- Stop the MySQL server.
- Restore the backup of the table.
- Start the MySQL server.
4. Third-party tools
Note :
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