How can open multiple database?

Can you have multiple 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.

What is multiple database file?

Multiple Files for a Database. All data for a database is now stored in multiple files rather than a single file. Typically, each column is stored in a separate file. For tables with many columns, columns are automatically grouped and each group is stored in a single file.

How can we use two databases to a single application?

so, based on user login, the application should connect different database server. For Ex: if user "xxx" login with credential and belogs to "ABC" company and the database is "ABC", then ABC data need to display on the web page.

Can a DBMS have multiple databases?

A multi-model database is a database that can store, index and query data in more than one model. For some time, databases have primarily supported only one model, such as: relational database, document-oriented database, graph database or triplestore. A database that combines many of these is multi-model.