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DB2 Cube Views: A Primer
book

DB2 Cube Views: A Primer

by Corinne Baragoin, Geetha Balasubramaniam, Bhuvaneshwari Chandrasekharan, Landon DelSordo, Jan B. Lillelund, Julie Maw, Annie Neroda, Paulo Pereira, Jo A. Ramos
September 2003
Beginner to intermediate content levelBeginner to intermediate
754 pages
18h 9m
English
IBM Redbooks
Content preview from DB2 Cube Views: A Primer
474 DB2 Cube Views: A Primer
Generally speaking, without MQTs, there is an expectation that the Query 2’s will
perform better than the Query 1’s because of the level of aggregation required in
the Query 1 queries (and of course the Query 2’s also perform record selection).
This is shown in the results for the majority of the query workloads. There are
exceptions to this however because another factor that needs to be taken into
account are the number of queries generated by Hybrid Analysis. For example,
consider the H5 set of query workloads. H5_Query 1a requires the highest level
of aggregation and without the MQT performs poorly even though ...
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Publisher Resources

ISBN: 0738499730Purchase book