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Speeding Up Queries with Semi-Joins and Anti-Joins: How Oracle Evaluates EXISTS, NOT EXISTS, IN, and NOT IN - PowerPoint PPT Presentation

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Speeding Up Queries with Semi-Joins and Anti-Joins: How Oracle Evaluates EXISTS, NOT EXISTS, IN, and NOT IN

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Conventional join access path followed by a sort to remove duplicate rows. ... ( 18 of the 20 rows resulting from the hash join were apparently duplicates. ... – PowerPoint PPT presentation

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