What level of IBM i supports DB2 for i?
DB2 for i is not relevant to a specific OS (Operating System) level, but rather, built into the OS at all levels. There is only one RDBMS within IBM i. The current level of DB2 for i is Version 6 Release 1 (6.1). The functionality of DB2 for i will differ with each version/release of IBM i, as new enhancements are introduced with each new version.