Query performance in the Db2 12 initial release
The initial release of Db2 12 delivers enhanced query performance.
Important: Db2 12 introduces continuous delivery of new capabilities and enhancements in function levels. Most new capabilities become available only after activation of the Db2 12 function level that introduces them, or when applications run with the corresponding application compatibility level. For more information, see Activating Db2 12 function levels.