A database is a set of parameters used to connect to a database. A database instance refers to an active connection established to a database from these parameters.
You can add databases via the UI.
Only administrators can edit databases.
Databases of type Postgresql and Mysql are supported.
If a firewall is blocking the connection port to the database, you can try to connect through a node (the latter will be used to create an SSH tunnel).
What involves using databases
SQL script tasks will execute a SQL script on a set of databases.
SQL report tasks will execute SQL queries to populate charts, and each of these queries may be executed on a different database.