应用系统的运行会使它的数据库内容发生变化，这种变化应该准确及时地反映到

应用系统的运行会使它的数据库内容发生变化，这种变化应该准确及时地反映到数据中心，即利用应用软件的数据库内容去更新数据中心的相关内容。最简单的方法是实行数据的整体更新，但数据的整体更新会因为数据量庞大而耗费大量时间，可能还会堵塞网络。在应用系统端设置数据索引，记录上次数据更新时，应用系统端数据库中数据的情况，并与当前数据库中数据进行比较，确定已经发生变化的数据，使数据的更新仅针对这些数据进行，减少网络中数据的传输量。

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结果 (英语) 1: [复制]

复制成功！

The operation of the application system will change the content of its database, and this change should be accurately and timely reflected in the data center, that is, use the database content of the application software to update the relevant content of the data center. The easiest way is to perform an overall update of the data, but the overall update of the data will take a lot of time due to the huge amount of data, and may also block the network. Set a data index on the application system side, record the data in the database on the application system side when the last data update was performed, and compare it with the data in the current database to determine the data that has changed, so that the data update is only carried out for these data, Reduce the amount of data transferred in the network.

正在翻译中..

结果 (英语) 2:[复制]

复制成功！

The operation of the application system will change its database content, which should be accurately and timely reflected in the data center, that is, use the database content of the application software to update the relevant content of the data center. The simplest way is to implement the overall update of data, but the overall update of data will consume a lot of time because of the huge amount of data, and may block the network. Set the data index at the application system side to record the data in the application system side database during the last data update, and compare it with the data in the current database to determine the changed data, so as to update the data only for these data and reduce the transmission volume of data in the network.

正在翻译中..

结果 (英语) 3:[复制]

复制成功！

The operation of the system will change its database content, and this change should be accurately and timely reflected in the data center, that is, using the database content of the application software to update the related content of the data center. The simplest method is to implement the overall data update, but the overall data update will take a lot of time because of the huge amount of data, and may even block the network. Set the data index at the application system side, record the data in the database of the application system side when the data was updated last time, and compare it with the data in the current database to determine the changed data, so that the data update is only for these data, and reduce the transmission amount of data in the network.

正在翻译中..

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