该程序从客户表中提取行并将它们发送到报告目标，它在本例中是标准输出。

The program fetches rows from the customer table and spools them to the report target, which is a standard output in this example.

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虽然CCD目标表不能自动将数据复制到不受支持的目标数据库中，但是它通过用户应用程序暴露数据。

While the CCD target table does not automate the replication of data to unsupported target databases, it does expose the data for consumption by a user application.

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另一方面，ALLOW NO ACCESS(默认值)防止并发应用程序访问目标表中的数据。

On the other hand, ALLOW NO access (the default) prevents concurrent applications from accessing target table data.

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