Parallel execution, a feature of Oracle Enterprise Edition (it is not available in the Standard Edition), is the ability to physically break a large serial task (any DML, or DDL in general) into many smaller bits that may all be processed simultaneously. Parallel executions in Oracle mimic the real-life processes we see all of the time. For example, you would not expect to see a single individual build a house; rather, many people team up to work concurrently to rapidly assemble ...
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D. Kuhn, T. KyteExpert Oracle Database Architecturehttps://doi.org/10.1007/978-1-4842-7499-6_1414. Parallel Execution
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