Here for the SAMPLE database, the keyword is set under the data source section.
对于SAMPLE数据库，这个关键字是在datasource区段中设置的。
You can drill down into any sample period that you want while you view the full set of data.
在查看完整的数据集时，您可以具体查看所需的任何采样期的数据。
You can drill down into any sample period that you want while you view the full set of data.
在查看完整的数据集时，您可以具体查看所需的任何采样期的数据。
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