Adom (Aryson Technologies)

Last Updated: Nov 19, 2021 3 Minute Read

Adom Click

Adom (Aryson Technologies)Technical Specialist at Aryson Technologies

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It can be difficult if you don't know how to recover lost/deleted data from MySQL databases or don't have enough experience with MySQL commands. That is why it is critical to back up your MySQL databases regularly.

MySQL is a SQL-based open-source relational database management system. It's used for a variety of things, including data warehousing, logging, and e-commerce applications. You can even keep a single record of information or a complete inventory of products in a MySQL database.

MySQL database files are also compatible with a variety of file formats, including.sql,.cnf,.ddl,.arm, and.qbquery. The data and tables in the MySQL database, on the other hand, are stored in many file formats. And losing these files might be disastrous for your company. The following are examples of file formats:

- The table structure file is named .frm.
- .ibd — InnoDB table data and indexes are saved in this file format.
- Db.opt — Describes the properties of a certain database.
- .myi (my initials) – This file contains the MyISAM table indexes:

We've covered some practical methods for backing up and repairing MySQL databases in this article.

2 Steps total

Step 1: Use the mysqldump command to create a backup.

The mysqldump command is useful for dumping the database together with the SQL queries needed to reconstruct it. With the following syntax, you can backup your MySQL database with this command:

**mysqldump -u [user] -p [database_name] > [filename].sql**

‘user' gives the username, ‘database name' specifies the file path, and ‘>' defines the output in the above command.

**mysqldump –all-databases –single-transaction –quick –lock-tables=false > full-backup-$(date +%F).sql -u root -p**

You may easily backup the chosen MySQL database with this command. However, if you wish to back up the entire database management system, run the command:

Now we'll look at how to recover a MySQL database.

**Methods to Repair MySQL Databases**

It is not difficult to repair a MySQL database, however it is dependent on the circumstances. Data Export and Data Import/Restore are available in MySQL Workbench, for example. You may restore your MySQL database with ease using any of these capabilities.

You may also use the mysqldump command in cmd to make a backup of your MySQL database and subsequently restore it. If you have a backup for the old data, another technique is to restore a MySQL database to a new MySQL server. Let's examine this strategy in greater detail.

1. Get [MySQL Server](https://dev.mysql.com/downloads/installer/) and install it on your computer. If you want to restore data to an earlier version, you can install a similar version.
2. To add the data directories, terminate the MySQL service.
3. Into the new MySQL–>data–>folder, copy the backup data folder.
4. Restart the MySQL service after adding the appropriate data to the new MySQL subdirectory.
5. Check and repair database tables — Use the mysqlcheck command followed by REPAIR to inspect and repair database tables. The database tables will not be corrupted if you follow these procedures.
6. You can export the database to a SQL dump or SQL file after correcting any corrupt data.

It's done! The database in MySQL has been restored.

Only if backups are accessible and you are technically competent can you use the manual way now. If you've entirely lost your database, you won't be able to restore it using the manual technique. As a result, we offer a backup option that can even restore data that has been removed forever.

Step 2: Quick Methods to Repair MySQL database

[Aryson MySQL Database Recovery](https://www.arysontechnologies.com/mysql-database-repair.html) is an excellent tool for recovering data from faulty MySQL databases. Users can preview each object of the repaired MySQL database before saving it. In addition, it has certain advanced features, such as the ability to restore data online or on a local drive-in offline mode, the ability to correct database corruption errors, numerous saving options, and so on.

**Steps to Repair Corrupt MySQL Database**

1. Download and run the Aryson MySQL Database Repair Tool.
2. Select MySQL Database (.idb and.frm) File from the Open menu.
3. Now, click the OK button, and the selected MySQL Database file will be scanned.
4. Examine the MySQL Database file that was retrieved.
5. Save the recovered database as a new script or MySQL Database online by clicking the "Save as MySQL Data" button.

Manual methods for recovering data from faulty MySQL databases can be tricky, but they are essential. So, we've discussed a practical approach for repairing and restoring MySQL databases to MySQL servers.

Published: Aug 19, 2021 · Last Updated: Nov 19, 2021

References

1 Comment

Datil

JCAlexandres Oct 23, 2021 at 08:33pm

Thanks for sharing! A database dump (Oracle), was one time my very last resource to recover a production database, as the application upgrade failed, and the tape drive failed at restore time on a HP-UX, running an MRP app, hosted on an Oracle database.