How to Export and Import Multiple MySQL Databases Simultaneously?

Efficient Database Management: Exporting and Importing Multiple MySQL Databases Simultaneously

This article addresses a common challenge faced by database administrators who need to maintain backups and facilitate data migration: the task of exporting and importing numerous MySQL databases simultaneously. With a comprehensive solution, you can safeguard your data and streamline database management processes.

Exporting Multiple MySQL Databases

To export all MySQL databases at once, utilizing the versatile mysqldump utility is highly recommended. Here's the command you would employ:

mysqldump -u root -p --all-databases > alldb.sql

In this command:

• -u root -p: Specifies the MySQL user and password for authentication.
• --all-databases: Exports all databases accessible to the user.
• >: Redirects the output to a single SQL file named alldb.sql.

You can further customize the export process by utilizing optional arguments. For instance, to:

• Perform a faster export (but with less storage efficiency): mysqldump -u root -p --opt --all-databases > alldb.sql
• Export without locking tables (which allows concurrent database operations): mysqldump -u root -p --all-databases --skip-lock-tables > alldb.sql

Importing Multiple MySQL Databases

To import all exported databases at once, simply use the following command:

mysql -u root -p < alldb.sql

In this command:

• -u root -p: Specifies the MySQL user and password for authentication.
• < alldb.sql: Reads the SQL file containing all the databases and imports them into the MySQL server.

By executing these commands, you can effortlessly export and import numerous MySQL databases simultaneously, ensuring data integrity and facilitating efficient database management.

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