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When managing multiple MySQL databases, the need to access data across servers arises. This question explores the possibility of directly fetching data from another server using a SELECT statement.
Despite the apparent simplicity of the query, the answer is unfortunately not a straightforward "Yes." MySQL does not natively support cross-server data retrieval. Instead, it requires the use of a more complex solution known as federated tables.
Federated tables allow MySQL to create a virtual link to a remote database, making it appear as if it is a local table. This allows for seamless data retrieval and manipulation across servers.
While federated tables offer a workaround, they come with certain limitations:
To set up federated tables, you will need to:
Once federated tables are set up, you can use the following query to access data from the remote database:
<code class="sql">SELECT * FROM [remote_database].[remote_table]</code>
While federated tables provide a way to bridge the gap between multiple MySQL servers, they are not a perfect solution. They offer read-only access, have compatibility requirements, and can introduce performance implications. For scenarios where cross-server data retrieval is critical, federated tables can be a viable option, but always consider their limitations before implementation.
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