Definition
Db2 for i is the database management system built into the IBM i operating environment, rather than a separate product installed on top of it. Most RPG, COBOL, and ERP applications running on IBM i read and write directly against Db2 for i, which is why it is treated as core infrastructure rather than an optional component.
That tight integration is also why AI and analytics tools connect to Db2 for i in place, through APIs and database connectors, instead of requiring the data to be exported or migrated to a separate platform first.