You can sample the data in the Oracle (or other) database and even edit the data that is available.

可以查看Oracle和其他数据库中的数据，甚至可以编辑数据。

youdao

Because this is an introductory article and the sample data is small, the topic is not covered here.

由于本文只是一篇介绍性的文章，而且样本数据偏小，因此这里不打算就此话题展开讨论。

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In such cases, the data analyst must build representative data samples from existing test data or sample the production data.

在这样的情况下，数据分析师必须从现有的测试数据或生产数据生成有代表性的数据样本。

youdao

They might say my sample period was off, ... but that's what the theory-- ... using my data for the sample period that I computed-- the expected returns and co-variances says one should do.

他们可能说我的采样周期是有问题的，不过我的结果都是靠理论-,我采用自己收集的数据计算出-,预期收益和协方差可以用来指导我们的投资行为。

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