The rest of this section takes you through the access path graph one more time from the data flow perspective so that you can gain a full understanding of the performance aspect of query execution.
本节的其余部分再一次以数据流的观点向您介绍访问路径图以便您可以在查询执行的性能方面获得充分的理解。
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Olson said there is no universal path to coming out, but his advice to those in the closet is: "the loss is far less than imagined and the gain is far more."