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Programming Interfaces
Data Management : Database Access : Database connections : Multi-database connection considerations
 
Multi-database connection considerations
When you develop a multi-database application, keep in mind the following information on database connections:
*Connect all databases accessed by the application at compile time. Once compiled, the application can run no matter where you store the databases or how you connect to them.
*Establish unique logical names for each of the databases you connect. Use these names to reference the databases within your application. These names are stored in the r-code of the application at compilation time. For more information on logical database names, see Logical database names.