How Can I Access Data from Remote MySQL Servers?

Accessing Data from Remote MySQL Servers: Breaking the Limitations

The desire to seamlessly access data residing on different MySQL servers is a common query among users. While a direct "INSERT INTO" statement might not be possible, there's a solution that breaks this limitation: federated tables.

Federated Tables: The Bridge Between Servers

Federated tables allow you to create virtual tables that reference data from other MySQL servers. By defining a federated table, you can specify the remote server, database, and table where the actual data resides.

Example:

Consider two MySQL servers: server1 and server2. To access data from the 'data' table on server2 into a federated table on server1, you can use the following syntax:

CREATE TABLE myFederatedTable (
  id INT,
  name VARCHAR(255),
  age INT
) ENGINE=FEDERATED
DEFAULT CONNECTION='mysql://user:password@server2:port/database';

In this example, 'myFederatedTable' is the federated table on server1 that points to the 'data' table on server2.

Limitations:

While federated tables provide access to remote data, there are some limitations:

• Not all MySQL features are supported for federated tables.
• Queries on federated tables can be slower than direct access.
• Data updates are not replicated to the remote server.

Additional Resources:

For more information and to set up federated tables in your environment, please refer to the following documentation:

• MySQL Federated Storage Engine: https://dev.mysql.com/doc/refman/en/federated-storage-engine.html
• MySQL Federated Storage Engine Usage Notes: https://dev.mysql.com/doc/refman/en/federated-usagenotes.html

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