With large tablespaces, well designed NPIs can improve query performance but can create performance and availability challenges. DPSIs can help, but have their own compromises. In this article, Toine Michielse provides an overview of some DPSI-related enhancements coming in DB2 11 for z/OS.
As with any new release of DB2 for z/OS there comes a host of SQL performance improvements. In this article, Dan Luksetich outlines a few interesting SQL enhancements coming our way in DB2 11 for z/OS.
SQL is much more than a data access language. It is a full-fledged programming language. This means that any business or scientific question can be answered using SQL. There are no longer limits to the capabilities of the SQL language.