What is the method for recovering a MySQL database?

There are several methods for MySQL database recovery:

1. Restore from backup: If there are regular backup files of the database, you can use them for restoration. First, stop the MySQL service, then copy the backup file to the MySQL data directory, and finally restart the MySQL service to complete the restoration.
2. Utilize binary logs for recovery: MySQL’s binary logs record all database update operations, providing a way to recover from issues. First, stop the MySQL service, then locate the most recent binary log file and its position from the last successful run. Use the command line tool mysqlbinlog to convert the binary log file into SQL statements, and execute these statements to restore the database.
3. Recovery using InnoDB transaction logs: The InnoDB storage engine supports transaction logs (Redo Log), which record transaction operations in the database. In case of a database crash, recovery can be done through the transaction logs. First, stop the MySQL service, then locate the most recent transaction log file and its position from when the database was last running normally. Use the command line tool mysqlbinlog to convert the transaction log file into SQL statements, and execute these SQL statements to restore the database.
4. Utilize third-party tools for recovery: You can also employ third-party database recovery tools to restore databases. These tools typically have more advanced recovery capabilities and can handle more complex database issues.

No matter which method is used for database recovery, a backup should be made before restoration to prevent data loss. Additionally, when restoring the database, the MySQL service needs to be stopped to ensure that database files are not altered or deleted.