换一种情况，如果您想要在只读模式打开已编辑的文件，您可以简单地改变nosimultaneousedits组。
Alternately, if you'd prefer always to open already edited files in read-only mode, you can simply change the NoSimultaneousEdits group to.
例如，第一个短事务使用只读查询来具体化对象，这让您可以在不打开事务就显示对象。
For example, the first short transaction materializes objects using a read-only query, which lets you display the objects without leaving the transaction open.
你可以使用以下过程在物理备库只读方式打开访问和执行重做应用来轮流切换。
You can alternate between having a physical standby database open for read-only access and performing Redo Apply using the following procedures.
以只读方式打开物理备库可以延长失败或中断恢复的时间，因为数据库必须在故障切换后重新启动。
Opening the physical standby database read-only may lengthen the time it takes to recover from a failure or outage, because the database must be restarted after a failover.
然后，你可以选择启用应用重做或者实时应用，再或者以只读方式打开数据库来访问。
You then have the option of either starting Redo apply or real-time apply, or opening the database for read-only access.
“只读”的意思是告诉我们，当前打开的部件不可以保存。
The words "Read Only" tell you that this part cannot be saved with its current name.
“只读”的意思是告诉我们，当前打开的部件不可以保存。
The words "Read Only" tell you that this part cannot be saved with its current name.
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