HomeMySQL Page 3 - Backing Up and Restoring Your MySQL Database
Easy Restore - MySQL
Do you need to change your web host or switch your database server? This is probably the only time when you really think of backing up your MySQL data. If you've got a website with a database or your custom database running for your applications, it is imperative that you make regular backups of the database. In this article, I will outline two easy ways of backing up and restoring databases in MySQL.
Now that you've got backups of your database, let's learn how to restore your backup in case your database goes down. Here's how you can restore your backed up database using the mysql command.
Restore using mysql
If you have to re-build your database from scratch, you can easily restore the mysqldump file by using the mysql command. This method is usually used to recreate or rebuild the database from scratch.
Here's how you would restore your custback.sql file to the Customers database.
mysql -u sadmin -p pass21 Customers < custback.sql
Easy isn't it ? Here's the general format you would follow:
mysql -u [username] -p [password] [database_to_restore] < [backupfile]
Now how about those zipped files? You can restore your zipped backup files by first uncompressing its contents and then sending it to mysql.
gunzip < custback.sql.sql.gz | mysql -u sadmin -p pass21 Customers
You can also combine two or more backup files to restore at the same time, using the cat command. Here's how you can do that.
cat backup1.sql backup.sql | mysql -u sadmin -p pass21
Moving Data Directly Between Databases
How would you like to replicate your present database to a new location? When you are shifting web hosts or database servers, you can directly copy data to the new database without having to create a database backup on your machine and restoring the same on the new server. mysql allows you to connect to a remote database server to run sql commands. Using this feature, we can pipe the output from mysqldump and ask mysql to connect to the remote database server to populate the new database. Let's say we want to recreate the Customers database on a new database server located at 22.214.171.124, we can run the following set of commands to replicate the present database at the new server.