How Can I Access Data from a Different MySQL Server?

Accessing Data from Different MySQL Servers

Developers often encounter the need to access data stored on a different MySQL server. The question arises whether this is feasible, and if so, how to achieve it.

Federated Tables: A Solution with Caveats

While directly accessing tables from another server may not be possible, MySQL offers a solution called federated tables. Federated tables allow you to create a virtual representation of tables from another server within your current database. Using federated tables, you can query data as if it were local.

However, it's important to note that federated tables have limitations. Data modifications made on a federated table will not be reflected on the original table. Additionally, certain query types may not be supported.

Setting Up Federated Tables

To set up federated tables, you must:

1. Enable the federated storage engine on both servers.
2. Grant appropriate permissions on the original table to the user who will access it remotely.
3. Create a federated table definition on the destination server using the CREATE FEDERATED TABLE statement.

For detailed instructions and further information, refer to the MySQL documentation:

• http://dev.mysql.com/doc/refman/en/federated-storage-engine.html
• http://dev.mysql.com/doc/refman/en/federated-usagenotes.html

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