After deleting data in the MySQL database, it may be difficult to restore the data if the database is not backed up or the data recovery function is enabled. Here are some possible ways to try to recover deleted data:
Backup recovery: If you have a backup file of the database, you can retrieve the deleted data in the backup before deleting the data. Import the backup file into the database to restore the data.
Binary log: The MySQL database will record all data change operations into the binary log. If you enable the binary log function, you can find the records of deletion operations and restore the data by restoring these operations.
Transaction rollback: If the operation of deleting data is performed in a transaction and the transaction is not committed, the rollback operation can be used to restore the data to the state before deletion.
Database recovery tools: There are some third-party database recovery tools that can help recover accidentally deleted data. These tools usually scan the physical files of the database and retrieve deleted data.
It is worth noting that in most cases, deleted data cannot be 100% recovered, especially when the data has been committed, the transaction has been closed and there is no backup. Therefore, in order to prevent data loss, it is recommended to make a data backup before performing the deletion operation to ensure a reliable means of data recovery.
In addition, in order to prevent accidental deletion of data, you can limit the permissions of deletion operations in the production environment, and carefully confirm when performing deletion operations in the development and test environments to avoid data loss caused by misoperations.