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RE:performance tuning for query with 27 left joins - response (4) by VandeBergB

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Don't make the mistake of confusing the measurement labels in the explain plan with wall clock time.  When your reading an explain plan, the following words are all pronounced as "COST", seconds, minutes, hours, days, years.... There is NO correlation between those labels and the expected duration of the query as measured by a stopwatch.

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