在Web上，为了发现对应用程序状态的修改，浏览器必须重新查询服务器。
On the Web, the browser has to re-query the server to discover modification to the state of the application.
您也可以远程进行这些查询；例如，您可以从不同的机器上查询服务器(运行ConTest)的状态。
You can also do these queries remotely; for example, you can query the state of a server (running with ConTest) from a different machine.
要查询服务器的运行状态，可以键入下面的命令。
在执行热还原期间，数据库服务器处于在线状态，并且onbar将查询sysutils数据库来获得关于备份的信息。
During warm restores, the database server is online and onbar will query the sysutils database for information about backups.
该方法可以通过确定服务器工作状态来精确地预计系统的查询费用。
This method can accurately predict the system contention state so that to estimate the cost of a query precisely.
请记住，时间点数据可以，并可能会更改每次查询其服务器更改的状态。
Bear in mind that the point-in-time data can and likely will change each time you query it, as the state of the server changes.
请记住，时间点数据可以，并可能会更改每次查询其服务器更改的状态。
Bear in mind that the point-in-time data can and likely will change each time you query it, as the state of the server changes.
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