How to Perform Inter-Database Joins in MySQL Across Different Servers Using Python?

MySQL: Inter-Database Joins on Distinct Servers via Python

In a MySQL environment where you have two separate databases, A and B, hosted on different servers, server1 and server2 respectively, you may encounter the need to establish joins between tables housed in different databases.

To achieve this inter-database connectivity programmatically in Python using MySQLDB, consider the following approaches:

Method 1: Utilizing the FEDERATED Storage Engine

The FEDERATED Storage Engine enables you to access tables in other databases like they are local tables. To use this method, follow these steps:

• Alter the remote table in database B to use the FEDERATED engine.
• Create a wrapper table in database A that links to the remote table in database B.
• Join the wrapper table to other tables in database A as needed.

Method 2: Employing Linked Servers via Another DBMS

If the FEDERATED Storage Engine is not feasible, you can utilize the concept of linked servers in a different database management system (e.g., Microsoft SQL Server) to retrieve data from both databases. To implement this method:

• Establish linked server connections between the two databases in the other DBMS.
• Issue queries from either database to access tables in the linked database.

By utilizing these approaches, you can perform inter-database joins even when tables are stored in separate databases on distinct servers, facilitating data integration and analysis scenarios.

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