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SIMD 101 on the IBM z13 Mainframe

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Troy Coleman

DB2 11 Improves Duplicate Removal in SQL Result Set

When DBAs tune SQL, one of their priorities is to find SQL that invokes sorts, because sorts are expensive.

The statements that typically cause sorts are SELECT DISTINCT and GROUP BY. Other causes of sorts include the use of MAX/MIN aggregate functions and certain non-correlated subqueries (not transformed). The latest DB2 release, DB2 11, is designed to bring improved query performance to applications that use these types of statements.

Joseph Gulla

Cloud Management

This post is the last in a series about the management of IT systems. The first three in the series were about systems, network and application management. The focus of this post is cloud management and how it plays a key role in public, private and hybrid cloud services.

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