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Oracle Data Warehouse Tuning for 10g
book

Oracle Data Warehouse Tuning for 10g

by Gavin JT Powell
April 2011
Intermediate to advanced content levelIntermediate to advanced
504 pages
16h 49m
English
Digital Press
Content preview from Oracle Data Warehouse Tuning for 10g
266 9.4 Specialized Analytical Syntax
AND s.location_id = l.location_id
AND s.industry_id = i.industry_id
AND s.product_id = p.product_id;
If we did something a little simpler, such as a SUM aggregation, then
the WITH clause could be useful, but perhaps still not as effective as using
real analytical capabilities by utilizing the OVER clause, as shown by the
query in Figure 9.10. In Figure 9.10, we are retrieving all summary aggrega-
tions whose summation is greater than 1% of the total aggregation for the
entire SALE fact table.
9.4.3 CASE and Cursor Expressions
CASE and cursor expressions allow CASE statements and typecasted cursor
executions to be embedded ...
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Publisher Resources

ISBN: 9781555583354