该模式的另一种选择是使用始终脱机模式并编写应用程序，当本地数据库发生更改时，将在后台立即进行同步操作。
An alternative to this pattern is using the always-offline pattern and coding the application to synchronize immediately in the background when changes are made to the local database.
如果不选择该选项，安装将立即在后台发生。
If you do not select this option, the installation takes place immediately in the background.
统计刷新在后台运行，alter FRAGMENT命令在alter操作完成后将立即返回。
Refreshing of the statistics runs in the background and the alter FRAGMENT command returns immediately after the alter operation is completed.
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