Can one application have multiple databases?

Can an application have two databases?

Multiple database technologies can be used with monolithic applications, and can even seem more natural in a microservices environment, where each service would have its own database. This approach, however, is not bulletproof. Far from it, actually.

How many databases can one application contain?

You can, I believe, create more than 256 databases per instance, but only 256 can be active at any point. If you try to activate more databases than you have configured for numdb, you will get: SQL1041N The maximum number of concurrent databases have already been started.

Can we connect two database in single application?

If you can work with single database, working with multiple is no different. You will need a connection string for each database. There rest is, as they say it, history.

Can I use multiple databases?

With Master-Slave topologies and modern practices such as Database sharding becoming increasingly ubiquitous, database administrators (DBAs) and developers are working with multiple databases more than ever before. Doing so is made a lot easier by software that can accommodate multiple database connections.