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Defining a DDF Location Alias

(Troy Coleman) Recently I introduced the MODIFY DDF command in DB2 10 and explained how it can be used to STOP and START connections to support maintenance windows. MODIFY DDF can also be used to define DDF locations so you can manage subsets of data sharing members dynamically (online) without the

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Explain Plan, Autotrace and Diff

(Barry McGillin) A SQL statement can be executed in many different ways, such as full table scans, index scans, nested loops, and hash joins. The query optimizer determines the most efficient way to execute a SQL statement after considering many factors related to the objects referenced and the cond